The effect of HfC content on mechanical properties HfC-W composites

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For improving the mechanical properties of tungsten, HfC-W composites were fabricated by ball milling and spark plasma sintering process. The microstructure and mechanical properties of the composites were investigated. The interdiffusion of the Hf and W atoms during sintering produced a mixed carbide, identified as (Hf,W)C. This interfacial mixed carbide helped in developing a good interface joint with the adjacent W matrix. The increase in mechanical properties of the HfC-W composite at room temperature as well as high temperature was attributed to the reinforcement effect of the HfC particles. One of the strengthening mechanisms of the composite can be attributed to the formation of mixed carbide (Hf,W)C by interdiffusion at the interface, which assured the effective load transfer from the W matrix to the hard HfC particles.
Publisher
ELSEVIER SCI LTD
Issue Date
2014-05
Language
English
Article Type
Article
Keywords

TUNGSTEN-MATRIX COMPOSITES; ELEVATED-TEMPERATURE; HAFNIUM CARBIDE; THERMOPHYSICAL PROPERTIES; TENSILE PROPERTIES; PARTICLES; W-LA2O3

Citation

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, v.44, pp.49 - 53

ISSN
0263-4368
DOI
10.1016/j.ijrmhm.2014.01.012
URI
http://hdl.handle.net/10203/190000
Appears in Collection
NE-Journal Papers(저널논문)MS-Journal Papers(저널논문)
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