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機(jī)械活化熱壓制備CuCr50觸頭材料的組織與性能
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TG146

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江西省教育廳科技項(xiàng)目,江西省材料科學(xué)與工程研究中心基金（ZX200301002）資助


Microstructures and Properties of CuCr50 Contact Materials Prepared by Mechanically Activated Hot Pressing
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    摘要:

    采用機(jī)械合金化（MA）活化CuCr50粉末，然后對(duì)MA粉進(jìn)行真空熱壓制備出CuCr50觸頭材料。結(jié)果表明，CuCr50MA粉為亞穩(wěn)態(tài)過飽和固溶體，這種過飽和固溶體在隨后的熱壓過程中發(fā)生脫溶現(xiàn)象。隨脫溶程度的不同，CuCr50塊體材料的組織與性能也發(fā)生相應(yīng)的變化。由于MA活化作用，使得CuCr50MA粉在較低的溫度保壓較短的時(shí)間內(nèi)便獲得了致密度高的塊體材料，并且第二相cr分布均勻，尺寸細(xì)小，其綜合性能優(yōu)于其它工藝方法獲得的CuCr50觸頭材料。

    Abstract:

    CuCr50 powders were first activated by mechanical alloying (MA),then used to prepare the contact materials by vacuum hot pressing. The results indicate that the CuCr50 powder by MA is ametastabe and supersaturated solid solution,would dissolve during the followed hot pressing. The microstructures and properties of bulk CuCr50 materials vary with the dissolving amounts of supersaturated solid solution. A bulk CuCr50 material of high density with fine and homogeneous Cr particles distributed can be acquired at lower temperature for shorter holding time in hot pressing due to the mechanically activated effect of MA powders. As a result,the synthetical properties of bulk CuCr50 materials fabricated by this method are superior to those prepared by other methods.

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魯世強(qiáng) 胡春文 李鑫 王克魯 董顯娟 賀躍輝.機(jī)械活化熱壓制備CuCr50觸頭材料的組織與性能[J].稀有金屬材料與工程,2007,36(6):1041~1045.[Lu Shiqiang, Hu Chunwen, Li Xin, Wang Kelu, Dong Xianjuan, He Yuehui. Microstructures and Properties of CuCr50 Contact Materials Prepared by Mechanically Activated Hot Pressing[J]. Rare Metal Materials and Engineering,2007,36(6):1041~1045.]
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