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機(jī)械活化熱壓制備新型Cu/Cr2Nb觸頭材料的組織與性能
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國(guó)家自然科學(xué)基金(50474009); 航空科學(xué)基金(05G56003); 江西省自然科學(xué)基金(0350045); 江西省材料科學(xué)與工程研究中心基金(ZX200401001)


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

    將Cu、Cr、Nb元素粉經(jīng)25 h機(jī)械合金化活化處理后，在1000 ℃保溫1 h的工藝下通過真空熱壓來制備新型Cu/Cr2Nb觸頭材料，研究了不同成分Cu/Cr2Nb觸頭材料的組織和性能。結(jié)果表明，在機(jī)械合金化過程中未能合成出Cr2Nb，但在熱壓過程中得到了充分合成和析出，所制備的Cu/Cr2Nb觸頭材料的組織均勻細(xì)小，Cr2Nb相尺寸在幾個(gè)微米。當(dāng)Cr2Nb含量(質(zhì)量分?jǐn)?shù))為25%～35%時(shí)，Cu/Cr2Nb觸頭材料的致密度與熔滲法和熱壓法制備的常規(guī)CuCr50觸頭材料相當(dāng)，但前者的硬度和電導(dǎo)率卻明顯高

    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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魯世強(qiáng),胡春文,王克魯,李 鑫,肖 璇,賀躍輝.機(jī)械活化熱壓制備新型Cu/Cr2Nb觸頭材料的組織與性能[J].稀有金屬材料與工程,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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