Potential of New-Generation Electron Beam Technology in Interface Modification of Cold and HVOF Sprayed MCrAlY Bond Coats

Electron beam (EB) technology treatment was carried out on CoNiCrAlY bond coats deposited on Inconel substrates via cold spray and HVOF techniques in dissimilar thicknesses. Such treatment was carried out with regard to the final materials microstructure, composition, surface roughness, and the quality of the coating-substrate interface. Following a multiple-step optimization of the processing parameters (such as beam pattern configuration, accelerating voltage, longitudinal speed, and multiple beam incidence), two final EB modifications were carried out on both coating types. It was found that the optimized EB treatment could lead to a significant alteration of the interface from a distinctive divide into smooth chemical and structural transition between the materials, significant decrease in surface roughness and porosity, and changes in mechanical properties (increase in Young’s modulus and decrease in hardness of the coating).

[1]  Takahiko Kato,et al.  First demonstration of promising selective electron beam melting method for utilizing high-entropy alloys as engineering materials , 2015 .

[2]  J. Cizek,et al.  Oxidation performance of cold spray Ti–Al barrier coated γ-TiAl intermetallic substrates , 2015 .

[3]  Carolin Körner,et al.  Process development for the manufacturing of 99.94% pure copper via selective electron beam melting , 2015 .

[4]  T. Pasang,et al.  Confirmation of the ω-phase in electron beam welded Ti–5Al–5V–5Mo–3Cr by high-resolution scanning transmission electron microscopy: An initial investigation into its effects on embrittlement , 2014 .

[5]  O. Kovárík,et al.  Fatigue Testing of TBC on Structural Steel by Cyclic Bending , 2014, Journal of Thermal Spray Technology.

[6]  P. Haušild,et al.  The influence of plasma sprayed multilayers of Cr2O3 and Ni10wt%Al on fatigue resistance , 2014 .

[7]  R. Zenker,et al.  First results of a new duplex surface treatment for cast iron: Electron beam remelting and plasma nitriding , 2013 .

[8]  H. Fu,et al.  Preparation and microstructure evolution of directionally solidified Al2O3/YAG/YSZ ternary eutectic ceramics by a modified electron beam floating zone melting , 2013 .

[9]  S. Seino,et al.  Radiation induced synthesis of PtCu/C nanoparticles using high-energy electron beam , 2012 .

[10]  J. Cizek.  Influence of Plasma and Cold Spray Ti Deposited Layers on High-Cycle Fatigue Properties of Ti6Al4V Substrates , 2012 .

[11]  T. Ando,et al.  Direct production of Nb3Al superconducting coil by electron beam irradiation on a cold-sprayed cylinder , 2010 .

[12]  B. Jodoin,et al.  Oxidation behaviour of CoNiCrAlY bond coats produced by plasma, HVOF and cold gas dynamic spraying , 2010 .

[13]  P. Haušild,et al.  Fatigue properties of Fe–Al intermetallic coatings prepared by plasma spraying , 2010 .

[14]  D. Tomus,et al.  Electron beam processing of Al-2Sc alloy for enhanced precipitation hardening , 2010 .

[15]  P. Nylén,et al.  Relationships Between Process Parameters, Microstructure, and Adhesion Strength of HVOF Sprayed IN718 Coatings , 2010, International Thermal Spray Conference.

[16]  Sunghak Lee,et al.  Improvement of hardness and fracture toughness of surface composites fabricated by high-energy electron-beam irradiation with Fe-alloy powders and VC powders , 2009 .

[17]  O. Kovárík,et al.  Fatigue Behavior of Bodies with Thermally Sprayed Metallic and Ceramic Deposits , 2008 .

[18]  C. Dong,et al.  Texture modification, grain refinement and improved hardness/corrosion balance of a FeAl alloy by pulsed electron beam surface treatment in the “heating mode” , 2008 .

[19]  Chang-jiu Li,et al.  Study of oxidation behavior of nanostructured NiCrAlY bond coatings deposited by cold spraying , 2008 .

[20]  P. Patnaik,et al.  TGO growth behaviour in TBCs with APS and HVOF bond coats , 2008 .

[21]  A. Reiter,et al.  Hybrid technology hard coating – Electron beam surface hardening , 2007 .

[22]  Jonghyun Kim,et al.  Electron beam welding of the dissimilar Zr-based bulk metallic glass and Ti metal , 2007 .

[23]  P. Xiao,et al.  Effect of the top coat on the phase transformation of thermally grown oxide in thermal barrier coatings , 2006 .

[24]  Anatolii Papyrin,et al.  Cold Spray Technology , 2006 .

[25]  P. C. Patnaik,et al.  Oxidation and crack nucleation/growth in an air-plasma-sprayed thermal barrier coating with NiCrAlY bond coat , 2005 .

[26]  Uţu Dragoş,et al.  Improvement of the oxidation behaviour of electron beam remelted MCrAlY coatings , 2005 .

[27]  L. Singheiser,et al.  Modelling of phase equilibria in MCrAlY coating systems , 2004 .

[28]  Hamid Assadi,et al.  Bonding mechanism in cold gas spraying , 2003 .

[29]  J. Cizek,et al.  Microstructure Modification of CGDS and HVOF Sprayed CoNiCrAlY Bond Coat Remelted by Electron Beam , 2016 .

[30]  A. Smigelskas.  Zinc diffusion in alpha brass , 1947 .