Processing and temperature-dependent properties of plasma-sprayed tungsten–stainless steel composites

0336626 - ÚFP 2010 RIV SE eng J - Journal Article
Matějíček, Jiří - Boldyryeva, Hanna
Processing and temperature-dependent properties of plasma-sprayed tungsten–stainless steel composites.
[Příprava a vlastnosti plazmově stříkaných kompozitů wolfram-ocel.]
Physica Scripta. T138, 014041 (2009), s. 1-4. ISSN 0031-8949. E-ISSN 1402-4896.
[International Workshop on Plasma-Facing Materials and Components for Fusion Applications/12th./. Jülich, 11.05.2009-14.05.2009]
Institutional research plan: CEZ:AV0Z20430508
Keywords : Fusion materials * plasma sprayed coatings * tungsten * FGM
Subject RIV: JG - Metallurgy
Impact factor: 1.088, year: 2009
http://iopscience.iop.org/1402-4896/2009/T138/014041/pdf?ejredirect=.iopscience

Tungsten–stainless steel (W+SS) composites and functionally graded materials (FGMs) have a potential application as joining material in plasma facing components for nuclear fusion devices. Here, tungsten provides the heat-resistant plasma facing armor, while stainless steel is the main structural material. The composite or FGM can reduce the stress concentration at the interface by providing a gradual transition. In this study, W+SS composites of various compositions were produced by water-stabilized plasma spraying. With the help of in-flight particle and plume diagnostics, powder injection was optimized for each material, and the feed rates were adjusted to account for different deposition efficiencies. The composition, structure, and thermal and mechanical properties of the coatings were characterized. As these materials are expected to function at elevated temperatures, the evolution of their properties with temperature was also studied.

Plazmové nástřiky na bázi wolframu mají potenciální využití jako mezivrstvy pro „plasma facing components“ fúzních reaktorů. V této práci byly připraveny plazmově stříkané kompozity a gradované vrstvy wolframu a oceli 316; byla provedena komplexní charakterizace jejich struktury, složení a tepelných a mechanických vlastností, a to i za zvýšených teplot.
Permanent Link: http://hdl.handle.net/11104/0180821