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熱壓法制備Ag-TiB2觸頭材料的組織及性能研究
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西安理工大學(xué)

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中圖分類(lèi)號(hào):

TG146.3

基金項(xiàng)目:

國(guó)家自然科學(xué)基金(51274163)、陜西省重點(diǎn)實(shí)驗(yàn)室科技計(jì)劃項(xiàng)目(13JS076)、陜西省重點(diǎn)科技創(chuàng)新團(tuán)隊(duì)（2012KCT-25) 、陜西省重點(diǎn)學(xué)科項(xiàng)目專(zhuān)項(xiàng)資金資助項(xiàng)目(2011HBSZS009)


Investigation on the microstructure and properties of Ag-TiB2 electrical contact material prepared by hot pressing
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Xi’an University of Technology

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    摘要:

    本文采用熱壓法制備了不同TiB2粒度增強(qiáng)的Ag-4wt%TiB2觸頭材料，研究了TiB2粒度大小對(duì)Ag-4wt%TiB2觸頭材料組織及性能的影響。利用掃描電子顯微鏡和激光共聚焦顯微鏡對(duì)Ag-4wt%TiB2觸頭材料的組織和電弧侵蝕后的形貌進(jìn)行了表征，對(duì)致密度、硬度及導(dǎo)電率進(jìn)行了測(cè)量。結(jié)果表明：熱壓法有助于提高Ag-4wt%TiB2觸頭材料的致密度。隨著TiB2粒徑的減小，硬度先增大后減小，導(dǎo)電率不斷增大。細(xì)小彌散分布的TiB2顆粒有助于改善耐電弧侵蝕性，侵蝕面積較大，蝕坑淺，燃弧時(shí)間短。

    Abstract:

    Ag-4wt%TiB2 electrical contact materials reinforced with different TiB2 particles were prepared by hot pressing, and the effect of TiB2 particle sizes on the micro-structure and properties of Ag-4wt%TiB2 electrical contact materials were studied. The microstructure and arc erosion morphology of Ag-4wt%TiB2 electrical contact materials were characterized by a scanning electron microscope and a confocal laser scanning microscope, and the relative density, hardness and electrical conductivity were tested as well. The results show that the hot pressing is favorable to improve the relative density of Ag-4wt%TiB2 electrical contact materials.With decrease of TiB2 particle size, the electrical conductivity constantly increases, while the hardness increases and then decreases. The fine and well distributed TiB2 particles are beneficial for the improvement of arc erosion resistance. The Ag-4wt%TiB2 contact material presents shallow erosion pits, large erosion area, and short arcing time.

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高倩雯.熱壓法制備Ag-TiB2觸頭材料的組織及性能研究[J].稀有金屬材料與工程,2017,46(2):503~508.[Gao Qianwen. Investigation on the microstructure and properties of Ag-TiB2 electrical contact material prepared by hot pressing[J]. Rare Metal Materials and Engineering,2017,46(2):503~508.]
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  • 收稿日期:2014-10-30
  • 最后修改日期:2014-12-31
  • 錄用日期:2015-01-13
  • 在線發(fā)布日期: 2017-04-10
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