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机械活化热压制备新型Cu/Cr2Nb触头材料的组织与性能
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国家自然科学基金(50474009); 航空科学基金(05G56003); 江西省自然科学基金(0350045); 江西省材料科学与工程研究中心基金(ZX200401001)


The Microstructures and Properties of Novel-Type Cu/Cr2Nb Contact Materials Fabricated Mechanically Activated Hot-Pressing
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    摘要:

    将Cu、Cr、Nb元素粉经25 h机械合金化活化处理后,在1000 ℃保温1 h的工艺下通过真空热压来制备新型Cu/Cr2Nb触头材料,研究了不同成分Cu/Cr2Nb触头材料的组织和性能。结果表明,在机械合金化过程中未能合成出Cr2Nb,但在热压过程中得到了充分合成和析出,所制备的Cu/Cr2Nb触头材料的组织均匀细小,Cr2Nb相尺寸在几个微米。当Cr2Nb含量(质量分数)为25%~35%时,Cu/Cr2Nb触头材料的致密度与熔渗法和热压法制备的常规CuCr50触头材料相当,但前者的硬度和电导率却明显高

    Abstract:

    Using Cu, Cr, Nb elemental powders activated by mechanical alloying (MA) for 25 h, the novel-type Cu/Cr2Nb contact materials were fabricated by vacuum hot-pressing at 1000 ℃ for 1 h. The microstructures and the properties of Cu/Cr2Nb contact materials with different compositions were investigated. The results show that Cr2Nb phase can not be synthesized during MA, but can be fully synthesized during vacuum hot-pressing. The prepared Cu/Cr2Nb contact materials have homogeneous and fine microstructures, and Cr2Nb phase sizes fall in several micro. The relative density of Cu/Cr2Nb contact materials with 25%~35% Cr2Nb is comparable with those of CuCr50 prepared by conventional or infiltrating process, but the hardness and conductivity of the former are obviously superior to those of the latter

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鲁世强,胡春文,王克鲁,李 鑫,肖 璇,贺跃辉.机械活化热压制备新型Cu/Cr2Nb触头材料的组织与性能[J].稀有金属材料与工程,2009,38(5):842~846.[Lu Shiqiang, Hu Chunwen, Wang Kelu, Li Xin, Xiao Xuan, He Yuehui. The Microstructures and Properties of Novel-Type Cu/Cr2Nb Contact Materials Fabricated Mechanically Activated Hot-Pressing[J]. Rare Metal Materials and Engineering,2009,38(5):842~846.]
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  • 收稿日期:2008-05-21
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