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高強(qiáng)高導(dǎo)Cu-Nb微觀復(fù)合材料熱穩(wěn)定性
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西北有色金屬研究院,西北有色金屬研究院

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國家自然科學(xué)基金項(xiàng)目（面上項(xiàng)目，重點(diǎn)項(xiàng)目，重大項(xiàng)目）


Thermal Stability of high strength and high conductivity Cu-Nb microcomposites
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Northwest Institute for Nonferrous Metal Research,Northwest Institute for Nonferrous Metal Research

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    摘要:

    通過集束拉拔技術(shù)制備了高強(qiáng)高導(dǎo)Cu-Nb微觀復(fù)合材料，采用X射線衍射、掃描電鏡等手段分析了不同熱處理?xiàng)l件下材料晶體取向、界面結(jié)構(gòu)的演變，通過應(yīng)力應(yīng)變曲線和電導(dǎo)測試研究了不同熱處理?xiàng)l件對材料強(qiáng)度、電導(dǎo)的影響規(guī)律，結(jié)果表明：700℃熱處理就可促使形成Cu、Nb的再結(jié)晶織構(gòu)，由極塑變形所導(dǎo)致的區(qū)域化學(xué)勢差異及原子擴(kuò)散是影響Cu/Nb界面穩(wěn)定性的關(guān)鍵因素；而700℃的中間熱處理可以極大改善材料后續(xù)的加工塑性，同時(shí)在一定后續(xù)形變量條件下仍可獲得高強(qiáng)度性能，而且通過低溫調(diào)整熱處理可改善材料導(dǎo)電性，同時(shí)保持較高強(qiáng)度。

    Abstract:

    High strength and high conductivity Cu-Nb microcomposites were fabricated by accumulated bundling and drawing process. The crystal orientation and morphology of Cu-Nb materials were investigated by means of X-ray diffraction and scanning electron microscopy. The stress-strain curves and conductivity of samples at different HT condition were measured. It is indicated that recrystallization textures are formed after HT at 700℃. Chemical potential difference and atomic diffusion caused by serve plastic deformation are key factors of interface stability. And even intermediate HT at 700℃ will be benefit for the mechanical properties of Cu-Nb microcomposites. It is believed that low temperature adjustment could improve the plasticity and keep the strength.

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梁明,李成山.高強(qiáng)高導(dǎo)Cu-Nb微觀復(fù)合材料熱穩(wěn)定性[J].稀有金屬材料與工程,2017,46(2):382~386.[Liang Ming, Li Chengshan. Thermal Stability of high strength and high conductivity Cu-Nb microcomposites[J]. Rare Metal Materials and Engineering,2017,46(2):382~386.]
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  • 收稿日期:2014-10-27
  • 最后修改日期:2014-12-02
  • 錄用日期:2015-03-25
  • 在線發(fā)布日期: 2017-04-10
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