期刊
MATERIALS LETTERS
卷 306, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.matlet.2021.130894
关键词
Mechanical alloying; Sintering; Refractory HEA WTaMoNb; Nanocrystalline materials
资金
- National Natural Science Foundation of China [51271143, 51904218]
- Natural Science Basic Research Program of Shaanxi [2021JQ-646, 2020JQ-811]
- Special Fund Project of Education Department in Shaanxi Province of China [21JK0688]
- Key and Shaanxi creative talents promotion plan-technological innovation team [2017KCT05]
Refractory high entropy alloy WTaMoNb was incorporated into a Cu matrix to synthesize WTaMoNb/Cu nanocomposite, with BCC/FCC structure, via two-step mechanical alloying and hot pressing sintering. The resulting Cu-10wt.%WTaMoNb alloy exhibited excellent thermal stability, high tensile strength, and electrical conductivity.
Refractory high entropy alloys (HEAs) have excellent thermal stability, good strength and toughness, which have great potential application as a second phase in improving microstructure and properties of metal matrix. Here, refractory HEA WTaMoNb is introduced into Cu matrix to synthesize WTaMoNb/Cu nanocomposite by two-step mechanical alloying (MA) and hot pressing sintering (HPS), which owns BCC/FCC structure. During MA, WTaMoNb is firstly prepared and then milled with Cu. Then, WTaMoNb/Cu nanocomposite is synthesised via HPS. The sintered Cu-10wt.%WTaMoNb alloy displays an excellent thermal stability, a high tensile strength of 758.3 +/- 20.8 MPa, and an electrical conductivity of 42.5 +/- 1.5% international annealed copper standard (IACS).
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