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超高溫?zé)崽幚韺?duì)不同工藝制備的W/ZrC金屬陶瓷微觀組織結(jié)構(gòu)的影響
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國(guó)防科學(xué)技術(shù)大學(xué),國(guó)防科技大學(xué)新型陶瓷纖維及其復(fù)合材料重點(diǎn)實(shí)驗(yàn)室,國(guó)防科技大學(xué)新型陶瓷纖維及其復(fù)合材料重點(diǎn)實(shí)驗(yàn)室,國(guó)防科技大學(xué)新型陶瓷纖維及其復(fù)合材料重點(diǎn)實(shí)驗(yàn)室

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TG146.411，TB331

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上海航天科技創(chuàng)新基金項(xiàng)目；湖南省高校科技創(chuàng)新團(tuán)隊(duì)支持計(jì)劃資助；國(guó)防科技大學(xué)創(chuàng)新群體資助


Effect of ultra-high temperature heat treatment on microstructures of W/ZrC cermets fabricated by different routes
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National University of Defense Technology,Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology,Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology,Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology

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    摘要:

    分別采用置換填充工藝（DCP）和熱壓燒結(jié)工藝（HP）制備了W/ZrC金屬陶瓷，然后在2600℃下對(duì)其進(jìn)行熱處理1h，研究了熱處理前后兩種W/ZrC金屬陶瓷的組織結(jié)構(gòu)變化。研究表明熱處理后兩種材料都出現(xiàn)開(kāi)孔率增大、線膨脹及質(zhì)量損失。其中DCP法W/ZrC金屬陶瓷在熱處理后仍由分散分布的W顆粒相和連續(xù)的ZrC相組成，但原始材料中殘留的WC、W2C及Zr-Cu合金相都消失，取而代之的是大量的空隙，同時(shí)W相含量也急劇減小。而HP法W/ZrC金屬陶瓷在熱處理后則有新相W2C生成，同時(shí)其W顆粒相有聚集的趨勢(shì)，形成了大塊團(tuán)狀相。

    Abstract:

    W/ZrC cermets were fabricated by Displacive Compensation of Porosity (DCP) and Hot Pressing (HP), and then they were heat treated at 2600°C for 1 h. Microstructure changes of W/ZrC cermets before and after heat treatment were investigated. Results showed that both of two W/ZrC cermets had an increase of open porosity, a linear expansion and a weight loss after the heat treatment. Annealed DCP-derived W/ZrC cermets were still composed of dispersive W phases and continuous ZrC phases, but residual WC, W2C and Zr-Cu alloy were gone, instead, a large increase of pores and a sharp reduction of W phases appearing. While a new phase of W2C was formed in annealed HP-derived W/ZrC cermets, and W grains had a tendency to congregate together to form a big agglomerate phase.

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引用本文

余藝平,王松,李偉,蔣進(jìn)明.超高溫?zé)崽幚韺?duì)不同工藝制備的W/ZrC金屬陶瓷微觀組織結(jié)構(gòu)的影響[J].稀有金屬材料與工程,2017,46(1):63~67.[yuyiping, Wang Song, Li Wei, Jiang Jin Ming. Effect of ultra-high temperature heat treatment on microstructures of W/ZrC cermets fabricated by different routes[J]. Rare Metal Materials and Engineering,2017,46(1):63~67.]
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歷史
  • 收稿日期:2014-10-13
  • 最后修改日期:2014-11-06
  • 錄用日期:2014-12-25
  • 在線發(fā)布日期: 2017-03-16
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