Chemical Vapor Crystallization of Hard Nanocomposite Tungsten Carbide Layers for Extreme Applications

V.L. Goncharov; Y.V. Lakhotkin; V.P. Kuzmin; Vladimir K. Alimov; J. Roth

doi:10.4028/www.scientific.net/AMR.59.62

Paper Titles

Surface Modification and Deuterium Retention in Tungsten and Molybdenum Exposed to Low-Energy, High Flux Deuterium Plasmas
p.42

Enhancement of Reliability of Machines and Materials by Friction Plating
p.46

Machining of Carbon Fibre-Reinforced Silicon-Ccarbide Composites
p.51

TiC Reinforced Steel Matrix Composite Layers Produced by Laser Surface Alloying
p.55

Chemical Vapor Crystallization of Hard Nanocomposite Tungsten Carbide Layers for Extreme Applications
p.62

Micro-Raman Study on Structure Evolution of Graphite Exposed to Intense Thermal Shock Load
p.66

Features of Technological Layout of Manufacture of Unique Mono-Block Large-Dimension Plates
p.71

Al Si Oxide Coating as Ttritium Penetration Barrier on 316L Stainless Steel Prepared by a Combined Process
p.76

Methods of Increasing Thermal Conductivity of Plasma Sprayed Tungsten-Based Coatings
p.82

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Chemical Vapor Crystallization of Hard Nanocomposite Tungsten Carbide Layers for Extreme Applications

Abstract:

The physico-chemical fundamentals (thermodynamics, kinetics) of tungsten carbides crystallization process are presented. Chemically vapor deposited coatings composed of tungsten carbides, metallic tungsten matrix with nanoparticles of tungsten carbides are synthesized from gaseous mixture of tungsten hexafluoride, hydrogen and propane at temperatures ranging from 623 to 923 K and can be used as materials for extreme environments. The physical and mechanical characteristics of these CVD coatings are discussed.