기계화학적 공정의 밀링 방법에 따른 W-Cu 복합분말의 미세조직
Microstructure of W-Cu Composite Powders with Variation of Milling Method during Mechanochemical Process
2
조회
0
다운로드
1
인용
0
참고문헌
초록
Abstract
Recently, the fabrication process of the W-Cu nanocomposite powders has been studied to improve the sinterability through the mechanical alloying and reduction of W and Cu oxide mixtures. In this study, the W-Cu composites were produced by mechanochemical process (MCP) using WO3-CuO mixtures with two different milling types of low and high energy, respectively. These ball-milled mixtures were reduced in H2 atmosphere. The ball-milled and reduced powders were analyzed through XRD, SEM and TEM. The fine W-Cu powder could be obtained by the high energy ball-milling (HM) compared with the large Cu-cored structure powder by the low energy ball-milling (LM). After the HM for 20h, the W grain size of the reduced W-Cu powder was about 20 ~ 30 nm.