W-Cu高密度合金的制备  

Fabrication of W-Cu high density alloy

作　　者：刘丽荣[1] 司婷婷[1,2] 杨福民[2] 徐岩[2] 孙晓峰[2] 康煜平[1] 

机构地区：[1]沈阳工业大学材料科学与工程学院,沈阳110178 [2]中国科学院金属研究所高温合金研究室,沈阳110016

出　　处：《沈阳工业大学学报》2008年第5期547-550,共4页Journal of Shenyang University of Technology

摘　　要：高致密度是W-Cu合金性能优良的前提,但是由于W和Cu的不互溶,二者形成的是一种典型的假合金,因此W-Cu合金的制备只有通过粉末冶金的方法来完成.以仲钨酸铵和硝酸铜为原料,利用氢还原和烧结技术制备的W-Cu合金,其中w(Cu)=15%,通过SEM、XRD对制备过程中各阶段形成的产物及最终形成的W-Cu合金进行了相分析和组织形貌分析,并进行了性能试验.试验结果表明,通过此工艺制备出的W-Cu复合粉末具有均匀的化学组成和较高的烧结活性,在1 220℃烧结2 h后,其烧结体密度可达理论密度的98.45%,且在合金中形成了对导热、导电性能具有重要作用的Cu网络结构.The high tightness is the precondition that W-Cu alloy exhibits the high mechanical properties. Because W and Cu can not be intersolutioned and W-Cu alloy is a typical false alloy, the preparation of W-Cu alloy can be only implemented by powder metallurgy. The W-Cu （w （Cu） = 15% ） alloy was synthesized by means of hydrogen reduction and sintering processes. The raw material is ammonium paratungstate （APT） and Cu （NO3）2. The phase constituent and microstructural morphology of the products generated during every fabricating stage and W-Cu alloy were investigated using SEM and XRD, and the properties were tested. The results show that the W-Cu composite powder produced by the present processes has homogeneous chemical composition and high sintering activity. A high sintered density can be achieved at the lower temperature. The relative density of the W-Cu alloy sintered at 1 220℃ for 2 h is 98.45 %. The Cu net structure is achieved, which is favor to electricity and heat conduction.

关 键 词：W-Cu合金 仲钨酸铵 氢还原 烧结 网络结构 

分 类 号：TG13[一般工业技术—材料科学与工程]