Enhancement of Microstructural Homogeneity of W-Cu Pseudo-Alloy by Adding W-Cu Composite Powder in Infiltration Process
An infiltration technique using W-Cu composite powder has been developed to enhance microstructural uniformity of W-Cu pseudo-alloy. W-Cu composite powder, manufactured by reduction from WO3 and CuO powder mixtures, were blended with W powder and then cold isostatically pressed into a cylindrical bar under 150 MPa. The pressed samples were pre-sintered at 1300 oC for 1 hour under hydrogen to make a skeleton structure. This skeleton structure was more homogeneous than that formed by using W and Cu powder mixtures. The skeleton structures were infiltrated with Cu under hydrogen atmosphere. The infiltrated W-Cu pseudo-alloy showed homogeneous microstructure without Cu rich region.
Duk Yong Yoon, Suk-Joong L. Kang, Kwang Yong Eun and Yong-Seog Kim
M. H. Hong et al., "Enhancement of Microstructural Homogeneity of W-Cu Pseudo-Alloy by Adding W-Cu Composite Powder in Infiltration Process", Materials Science Forum, Vols. 534-536, pp. 1257-1260, 2007