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Shrikant Joshi

Professor

Doctor of Philosophy, Chemical Engineering

Anställd på Avdelningen för avverkande och additiva tillverkningsprocesser.

Forskar inom området teknik, kemiteknik, produktionsteknik.


Research area/research interest

My current research interests span the areas of Additive Manufacturing (AM) and Surface Engineering. My AM-related research presently focuses on Ni-based superalloys and I am specifically interested in exploring the influence of post-treatment on build properties. Apart from the considerable existing strengths in various allied areas of AM here at University West, a strong network of industrial partners like GKN, Siemens, Sandvik, Arcam, Qunitus and Exova with complementary strengths makes this activity particularly interesting. Presently, funding from KK.Stiftelsen and Vinnova fuels this part of my research. Complementing my previous research in Surface Engineering that has included studies involving varied coating technologies, namely conventional atmospheric & solution precursor plasma spraying, detonation spraying, cold gas dynamic spraying, electron beam physical vapour deposition and cathodic arc PVD, my specific research focus for the past two years has been on solution-based plasma spraying, investigation of hybrid coatings involving use of solution and powder feedstock as well as on high velocity air-fuel (HVAF) coatings.

The objective is to enhance the functional properties of the coatings (thermal barrier, wear, corrosion etc.) beyond those achievable by conventional powder-based thermal spray routes. One of the projects funded by KK.Stiftelsen deals with assessment of different coating chemistries, with distinct scale-forming abilities, under various simulated and actual boiler environments. Another exciting activity that I spearhead deals with development of luminescent coatings in collaboration of ESS, University of Oslo and Stony Brook University.   

Teaching/supervision

I have developed a course on Surface Engineering which was offered during Autumn 2016 under the Produktion 2030

Keyword

Additive manufacturing, EBM, post-treatment, HIP, Solution precursor plasma spraying (SPPS), Suspension plasma spraying (SPS), hybrid, thermal barrier, TBC, coatings, wear, corrosion, luminescent.  

 

Publikationer


A facile approach to deposit graphenaceous composite coatings by suspension plasma spraying

Publicerat

A facile approach to deposit graphenaceous composite coatings by suspension plasma spraying

This paper demonstrates, for the first time ever, the deposition of graphenaceous composite coatings using an easy, yet robust, suspension plasma...

Advanced Coatings by Thermal Spray Processes

Publicerat

Advanced Coatings by Thermal Spray Processes

Coatings are pivotal in combating problems of premature component degradation in aggressive industrial environments and constitute a strategic area...

Advances in Corrosion-Resistant Thermal Spray Coatings for Renewable Energy Power Plants. Part I : Effect of Composition and Microstructure

Publicerat

Advances in Corrosion-Resistant Thermal Spray Coatings for Renewable Energy Power Plants. Part I : Effect of Composition and Microstructure

Power generation from renewable resources has attracted increasing attention in recent years owing to the global implementation of clean energy...

Chlorine-induced high-temperature corrosion and erosion-corrosion of HVAF and HVOF-sprayed amorphous Fe-based coatings

Publicerat

Chlorine-induced high-temperature corrosion and erosion-corrosion of HVAF and HVOF-sprayed amorphous Fe-based coatings

Chlorine-induced high-temperature corrosion and erosion-corrosion behavior of amorphous Fe-based coatings sprayed by high velocity air-fuel (HVAF)...

Coatings for automotive gray cast iron brake discs : A review

Publicerat

Coatings for automotive gray cast iron brake discs : A review

Gray cast iron (GCI) is a popular automotive brake disc material by virtue of its high melting point as well as excellent heat storage and damping...

Durability of Gadolinium Zirconate/YSZ Double-Layered Thermal Barrier Coatings under Different Thermal Cyclic Test Conditions

Publicerat

Durability of Gadolinium Zirconate/YSZ Double-Layered Thermal Barrier Coatings under Different Thermal Cyclic Test Conditions

Higher durability in thermal barrier coatings (TBCs) is constantly sought to enhance the service life of gas turbine engine components such as blad...

Effect of Different Post-treatments on the Microstructure of EBM-Built Alloy 718

Publicerat

Effect of Different Post-treatments on the Microstructure of EBM-Built Alloy 718

Electron beam melting (EBM) of Alloy 718 is of rapidly growing interest as it allows cost-effective production of complex components. However, the...

Effect of post-treatments under hot isostatic pressure on microstructural characteristics of EBM-built Alloy 718

Publicerat

Effect of post-treatments under hot isostatic pressure on microstructural characteristics of EBM-built Alloy 718

Electron beam melting (EBM) has emerged as an important additive manufacturing technique. In this study, Alloy 718 produced by EBM was investigated...

Effects of surface finish on the initial oxidation of HVAF-sprayed NiCoCrAlY coatings

Publicerat

Effects of surface finish on the initial oxidation of HVAF-sprayed NiCoCrAlY coatings

Oxide scale formed on HVAF-sprayed NiCoCrAlY coatings and the effect of surface treatment were investigated by a multi-approach study combining...

Experimental visualization of microstructure evolution during suspension plasma spraying of thermal barrier coatings

Publicerat

Experimental visualization of microstructure evolution during suspension plasma spraying of thermal barrier coatings

This paper investigates the evolution of microstructure of thermal barrier coatings (TBCs) produced by suspension plasma spraying (SPS) through a...

Exploiting Suspension Plasma Spraying to Deposit Wear-Resistant Carbide Coatings.

Publicerat

Exploiting Suspension Plasma Spraying to Deposit Wear-Resistant Carbide Coatings.

Titanium- and chromium-based carbides are attractive coating materials to impart wear resistance. Suspension plasma spraying (SPS) is a relatively...

High-Temperature Corrosion of HVAF-Sprayed Ni-Based Coatings for Boiler Applications

Publicerat

High-Temperature Corrosion of HVAF-Sprayed Ni-Based Coatings for Boiler Applications

The present study investigates the initial corrosion behaviour of HVAF-sprayed NiCr, NiAl and NiCrAlY coatings in two different environments, O 2 +...

Increasing α-phase content of alumina-chromia coatings deposited by suspension plasma spraying using hybrid and intermixed concepts

Publicerat

Increasing α-phase content of alumina-chromia coatings deposited by suspension plasma spraying using hybrid and intermixed concepts

The novel method of hybrid suspension plasma spraying of dry coarse aluminum oxide powder with chromium oxide suspension using hybrid water/argon-s...

Influence of microstructure on the erosion behaviour of suspension plasma sprayed thermal barrier coatings

Publicerat

Influence of microstructure on the erosion behaviour of suspension plasma sprayed thermal barrier coatings

Thermal barrier coatings (TBCs) are applied on the surface of hot parts of gas turbine engines to increase the turbine efficiency by providing...

Microstructure modelling of laser metal powder directed energy deposition of alloy 718

Publicerat

Microstructure modelling of laser metal powder directed energy deposition of alloy 718

A multi-component and multi-phase-field modelling approach, combined with transformation kinetics modelling, was used to model microstructure...

Performance of Hybrid Powder-Suspension Axial Plasma Sprayed Al2O3-YSZ Coatings in Bovine Serum Solution

Publicerat

Performance of Hybrid Powder-Suspension Axial Plasma Sprayed Al2O3-YSZ Coatings in Bovine Serum Solution

Ceramic coatings on metallic implants are a promising alternative to conventional implants due to their ability to offer superior wear resistance....

Process Parameter Impact on Suspension-HVOF-Sprayed Cr2O3 Coatings

Publicerat

Process Parameter Impact on Suspension-HVOF-Sprayed Cr2O3 Coatings

Chromium oxide (Cr2O3) is commonly used as an atmospheric plasma-sprayed (APS) coating from powder feedstock in applications requiring resistance t...

Room temperature and 600 °C erosion behaviour of various chromium carbide composite coatings

Publicerat

Room temperature and 600 °C erosion behaviour of various chromium carbide composite coatings

In this study, the erosion behaviour of laser clad chromium carbide-Ni rich alloy composite coatings with a wide range of carbide contents at room...

Two-dimensional CuIn1−xGaxSe 2 nano-flakes by pulse electrodeposition for photovoltaic applications

Publicerat

Two-dimensional CuIn1−xGaxSe 2 nano-flakes by pulse electrodeposition for photovoltaic applications

Fabrication of Cu(In,Ga)Se 2 (CIGS) absorber layers containing two-dimensional nano-flake structures using a single stage pulse electrodeposition...

Chlorine-induced high temperature corrosion of HVAF-sprayed Ni-based alumina and chromia forming coatings

Publicerat

Chlorine-induced high temperature corrosion of HVAF-sprayed Ni-based alumina and chromia forming coatings

Chlorine-induced corrosion of HVAF-sprayed Ni21Cr and Ni5Al coatings was investigated in 5 vol.% O2 + 500vppm HCl + N2 with and without KCl at 600 ...

CrAlSiN nanocomposite thin films for high-speed machining applications

Publicerat

CrAlSiN nanocomposite thin films for high-speed machining applications

CrAlSiN nanocomposite thin films with varying film chemistry were developed on tungsten carbide (WC)specimens using cylindrical cathodic arc physic...

Cu(In,Ga)Se2 Films with Branched Nanorod Architectures Fabricated by Economic and Environmentally Friendly Pulse-Reverse Electrodeposition Route

Publicerat

Cu(In,Ga)Se2 Films with Branched Nanorod Architectures Fabricated by Economic and Environmentally Friendly Pulse-Reverse Electrodeposition Route

Cu(In,Ga)Se2 (CIGS) materials are one of the most promising solar cell technologies owing to their large absorption coefficient and tunable direct...

Effect of SiO2 Dispersion on Chlorine-Induced High-Temperature Corrosion of High-Velocity Air-Fuel Sprayed NiCrMo Coating

Publicerat

Effect of SiO2 Dispersion on Chlorine-Induced High-Temperature Corrosion of High-Velocity Air-Fuel Sprayed NiCrMo Coating

NiCrMo coatings with and without dispersed SiO2 were deposited using high-velocity air-fuel technique. Thermogravimetric experiments were conducted...

Effect of water vapor on the oxidation behavior of HVAF-sprayed NiCr and NiCrAlY coatings

Publicerat

Effect of water vapor on the oxidation behavior of HVAF-sprayed NiCr and NiCrAlY coatings

Isothermal oxidation behavior of NiCr and NiCrAlY coatings deposited onto low alloy 16Mo3 steel by high-velocity air fuel (HVAF) process was...

Function-dependent coating architectures by hybrid powder-suspension plasma spraying : Injector design, processing and concept validation

Publicerat

Function-dependent coating architectures by hybrid powder-suspension plasma spraying : Injector design, processing and concept validation

The attractive properties achieved by Suspension Plasma Spraying (SPS), combined with the availability of high throughput capable plasma spray...

Hot corrosion behavior of plasma sprayed powder-solution precursor hybrid thermal barrier coatings

Publicerat

Hot corrosion behavior of plasma sprayed powder-solution precursor hybrid thermal barrier coatings

In recent times, plasma sprayed powder-solution precursor hybrid composite thermal barrier coatings have been developed to harness the dual benefit...

Influence of KCl and HCl on high temperature corrosion of HVAF-sprayed NiCrAlY and NiCrMo coatings

Publicerat

Influence of KCl and HCl on high temperature corrosion of HVAF-sprayed NiCrAlY and NiCrMo coatings

The oxidation performance of NiCrAlY and NiCrMo coatings thermally sprayed by high velocity air-fuel (HVAF) technique has been investigated in a...

Isothermal Oxidation Behavior of EBM-Additive Manufactured Alloy 718

Publicerat

Isothermal Oxidation Behavior of EBM-Additive Manufactured Alloy 718

Oxidation of Alloy 718 manufactured by electron beam melting (EBM) process has been undertaken in ambient air at 650, 700, and 800 °C for up to 168...

KCl-Induced High Temperature Corrosion Behavior of HVAF-Sprayed Ni-Based Coatings in Ambient Air

Publicerat

KCl-Induced High Temperature Corrosion Behavior of HVAF-Sprayed Ni-Based Coatings in Ambient Air

KCl-induced high temperature corrosion behavior of four HVAF-sprayed Ni-based coatings (Ni21Cr, Ni5Al, Ni21Cr7Al1Y, and Ni21Cr9Mo) under KCl deposi...

Microstructure and wear behaviour of powder and suspension hybrid Al2O3–YSZ coatings

Publicerat

Microstructure and wear behaviour of powder and suspension hybrid Al2O3–YSZ coatings

Abstract Suspension based plasma sprayed coatings can yield superior microstructural and tribological properties compared to conventional powder...

Process Parameter Impact on Selective Laser Ablation of Bilayer Molybdenum Thin Films for CIGS Solar Cell Applications

Publicerat

Process Parameter Impact on Selective Laser Ablation of Bilayer Molybdenum Thin Films for CIGS Solar Cell Applications

Cu(In,Ga)Se2 or CIGS absorber layers are a promising candidate for thin film solar cells, with efficiency exceeding 22% having already been...

Tailoring columnar microstructure of axial suspension plasma sprayed TBCs for superior thermal shock performance

Publicerat

Tailoring columnar microstructure of axial suspension plasma sprayed TBCs for superior thermal shock performance

This paper investigates the thermal shock behavior of thermal barrier coatings (TBCs) produced by axial suspension plasma spraying (ASPS). TBCs wit...

The Effect of Location and Post-treatment on the Microstructure of EBM-Built Alloy 718

Publicerat

The Effect of Location and Post-treatment on the Microstructure of EBM-Built Alloy 718

Additive manufacturing (AM) of Ni-based superalloys such as Alloy 718 may obviate the need for difficult machining and welding operations associate...

Axial suspension plasma spraying of Al2O3 coatings for superior tribological properties

Publicerat

Axial suspension plasma spraying of Al2O3 coatings for superior tribological properties

Suspension plasma spray is a relatively new thermal spray technique which enables feeding of fine powder to produce advanced coatings for varied...

Correlation of splat state with deposition characteristics of cold sprayed niobium coatings

Publicerat

Correlation of splat state with deposition characteristics of cold sprayed niobium coatings

The cold spray technique has a great potential to deposit refractory metals for a variety of potential applications. Cold spraying of different...

Development of high-performance cols-sprayed nano-structured NI-20Cr coatings for hash environment of power plant boilers

Publicerat

Development of high-performance cols-sprayed nano-structured NI-20Cr coatings for hash environment of power plant boilers

Effect of hole-transporting materials on the photovoltaic performance and stability of all-ambient-processed perovskite solar cells

Publicerat

Effect of hole-transporting materials on the photovoltaic performance and stability of all-ambient-processed perovskite solar cells

High-efficiency perovskite solar cells (PSCs) reported hitherto have been mostly prepared in a moisture and oxygen-free glove-box atmosphere, which...

Effect of substrate roughness on adhesion and tribological properties of nc-TiAlN/a-Si3N4 nanocomposite coatings deposited by cathodic arc PVD process

Publicerat

Effect of substrate roughness on adhesion and tribological properties of nc-TiAlN/a-Si3N4 nanocomposite coatings deposited by cathodic arc PVD process

TiN and Ti–Al–Si–N nanocomposite coatings of the type nc-TiAlN/a-Si3N4 have been prepared by cathodic arc physical vapour deposition process using...

Fracture behaviour of nc-TiAlN/a-Si3N4 nanocomposite coating during nanoimpact test

Publicerat

Fracture behaviour of nc-TiAlN/a-Si3N4 nanocomposite coating during nanoimpact test

Cyclic nanoimpact tests were carried on nc-TiAlN/a-Si3N4 nanocomposite, TiN and multilayered TiN/nanocomposite (NC) coatings to evaluate their...

High performance broad band antireflective coatings using a facile synthesis of ink-bottle mesoporous MgF2 nanoparticles for solar applications

Publicerat

High performance broad band antireflective coatings using a facile synthesis of ink-bottle mesoporous MgF2 nanoparticles for solar applications

Ultra-low refractive index thin films suitable for practical antireflective (AR) applications must be highly transparent, economical, and durable...

High Temperature Corrosion of HVAF-Sprayed NiCrAlY Coating Exposed to Various Corrosive Environments

Publicerat

High Temperature Corrosion of HVAF-Sprayed NiCrAlY Coating Exposed to Various Corrosive Environments

High Temperature Erosion-Corrosion behavior of HVAF- & HVOF-Sprayed Fe-based Coatings

Publicerat

High Temperature Erosion-Corrosion behavior of HVAF- & HVOF-Sprayed Fe-based Coatings

HVAF spraying for biomass boiler applications: : Oxidation behavior of Ni-based coatings in moisture-laden environment

Publicerat

HVAF spraying for biomass boiler applications: : Oxidation behavior of Ni-based coatings in moisture-laden environment

Hybrid powder-suspension Al2O3-ZrO2 coatings by axial plasma spraying: Processing, characteristics & tribological behavior

Publicerat

Hybrid powder-suspension Al2O3-ZrO2 coatings by axial plasma spraying: Processing, characteristics & tribological behavior

Hybrid powder-suspension Al2O3-ZrO2 coatings by axial plasma spraying : Processing, characteristics & tribological behaviour

Publicerat

Hybrid powder-suspension Al2O3-ZrO2 coatings by axial plasma spraying : Processing, characteristics & tribological behaviour

The ability of suspension plasma spraying (SPS) to overcome difficulties associated with feeding of fine (submicron or nano-sized) powders and...

Influence of Isothermal Heat Treatment on Porosity and Crystallite Size in Axial Suspension Plasma Sprayed Thermal Barrier Coatings for Gas Turbine Applications

Publicerat

Influence of Isothermal Heat Treatment on Porosity and Crystallite Size in Axial Suspension Plasma Sprayed Thermal Barrier Coatings for Gas Turbine Applications

xial suspension plasma spraying (ASPS) is an advanced thermal spraying technique, which enables the creation of specific microstructures in thermal...

Isothermal oxidation behavior of HVAF-sprayed Ni and NiCr coatings in H2-H2O environment

Publicerat

Isothermal oxidation behavior of HVAF-sprayed Ni and NiCr coatings in H2-H2O environment

The formation of a protective chromia scale on stainless steels is known to be suppressed by the presence of water vapor in reducing conditions....

Isothermal oxidation behavior of HVAF-sprayed NiCoCrAlY coatings : Effect of surface treatment

Publicerat

Isothermal oxidation behavior of HVAF-sprayed NiCoCrAlY coatings : Effect of surface treatment

NiCoCrAlY coatings are widely used as bond coats for ceramic thermal barrier coatings (TBCs) andoxidation and corrosion protective overlay coatings...

Isothermal oxidation of HVAF-sprayed Ni-based chromia, alumina and mixed-oxide scale forming coatings in ambient air

Publicerat

Isothermal oxidation of HVAF-sprayed Ni-based chromia, alumina and mixed-oxide scale forming coatings in ambient air

The power generation industry has been progressively shifting towards higher operating steam temperatures and pressures to increase efficiency and...

KCI-induced corrosion behavior of HVAF-sprayed Ni-based coatings in ambient air

Publicerat

KCI-induced corrosion behavior of HVAF-sprayed Ni-based coatings in ambient air

It is well known that the presence of KCl deposited on superheater tubes in biomass- and waste-fired boilers leads to a severe corrosion and...