Effect of La Addition in W Skeleton on Microstructure and Properties of WCu Alloy
In order to improve properties of WCu alloy, the different La were introduced into W skeleton during sintering process. The hardness, electrical conductivity and the compression stress were tested, and the microstructure and composition were characterized by a scanning electron microscope. The results show that an appropriate rare earth La addition can purify W/W interface, enhance the bonding of W /W, and improve the densification and the integral properties of WCu alloy. In the range of experiments, WCu alloy with 0.3wt% La addition has the largest hardness value of 198HB and the maximum compression stress of 823N/mm2. In comparison with that without La addition, 0.3wt%La addition decreases the electrical conductivity slightly, but improves the hardness and the maximum compression stress significantly, which are increased by 23.6% and 57.2%, respectively.
Guojun Zhang and Jessica Xu
B. Wang et al., "Effect of La Addition in W Skeleton on Microstructure and Properties of WCu Alloy", Advanced Materials Research, Vols. 160-162, pp. 1606-1610, 2011