2O3合金;放電等離子體燒結(jié);微量元素"/> 2O3和W-Nb-C-Lu2O3合金,通過(guò)場(chǎng)發(fā)射掃描電子顯微鏡(FE-SEM)、能譜(EDS)和透射電子顯微鏡(TEM)研究分析了合金復(fù)合粉末的形貌、合金燒結(jié)體表面形貌和斷口形貌；測(cè)定了合金的致密度、熱導(dǎo)率、硬度和強(qiáng)度。實(shí)驗(yàn)結(jié)果表明：在W-Lu2O3的基礎(chǔ)上添加微量Nb和C對(duì)鎢合金晶粒細(xì)化、致密化和強(qiáng)度提高有著明顯的效果,W-Nb-C-Lu2O3合金的致密度比W-Lu2O3提高了5.75%,達(dá)到了95.12%,晶粒尺寸由8~13 μm細(xì)化到2~5 μm,W-Nb-C-Lu2O3合金比W-Lu2O3合金的顯微硬度和強(qiáng)度得到明顯改善。"/>

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微量元素Nb、C強(qiáng)化W-Lu2O3復(fù)合材料的組織及性能研究
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合肥工業(yè)大學(xué)材料科學(xué)與工程學(xué)院,合肥工業(yè)大學(xué)材料科學(xué)與工程學(xué)院,合肥工業(yè)大學(xué)材料科學(xué)與工程學(xué)院,中科院等離子體物理研究所,合肥工業(yè)大學(xué)材料科學(xué)與工程學(xué)院,合肥工業(yè)大學(xué)材料科學(xué)與工程學(xué)院

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國(guó)際熱核聚變實(shí)驗(yàn)堆(ITER)計(jì)劃專(zhuān)項(xiàng)(2014GB121001)；國(guó)家自然基金面上項(xiàng)目(51474083)


Research on microstructures and properties of W-Lu2O3 composite strengthened with Nb and C trace elements
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School of Material Science and Engineering,Hefei University of Technology,School of Material Science and Engineering,Hefei University of Technology,School of Material Science and Engineering,Hefei University of Technology,Institute of Plasma Physics,Chinese Academic Sciences,School of Material Science and Engineering,Hefei University of Technology,School of Material Science and Engineering,Hefei University of Technology

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    摘要:

    采用機(jī)械球磨和放電等離子體燒結(jié)制備了W-Lu2O3和W-Nb-C-Lu2O3合金,通過(guò)場(chǎng)發(fā)射掃描電子顯微鏡(FE-SEM)、能譜(EDS)和透射電子顯微鏡(TEM)研究分析了合金復(fù)合粉末的形貌、合金燒結(jié)體表面形貌和斷口形貌；測(cè)定了合金的致密度、熱導(dǎo)率、硬度和強(qiáng)度。實(shí)驗(yàn)結(jié)果表明：在W-Lu2O3的基礎(chǔ)上添加微量Nb和C對(duì)鎢合金晶粒細(xì)化、致密化和強(qiáng)度提高有著明顯的效果,W-Nb-C-Lu2O3合金的致密度比W-Lu2O3提高了5.75%,達(dá)到了95.12%,晶粒尺寸由8~13 μm細(xì)化到2~5 μm,W-Nb-C-Lu2O3合金比W-Lu2O3合金的顯微硬度和強(qiáng)度得到明顯改善。

    Abstract:

    W-Lu2O3 and W-Nb-C-Lu2O3 composites were fabricated by mechanical milling and spark plasma sintering. The morphology of composite powders, surface and fracture surface morphology of the samples were characterized by field-emission scanning electron microscopy (FE-SEM), energy-dispersive spectroscopy (EDS) and transmission electron microscopy (TEM). The relative density, thermal conductivity, hardness and strength of the samples were also measured. Results revealed that the addition of trace Nb and C on the basis of W-Lu2O3 composite had an obvious effect on grain refinement, densification and strength. The relative density of W-Nb-C-Lu2O3 composite was 5.75% higher than W-Lu2O3 and reached 95.12%. The grain size of W-Nb-C-Lu2O3 composite was refined from 8~13 μm to 2~5 μm, and its microhardness and strength were obvious improved compared with W-Lu2O3 composite.

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張俊,羅來(lái)馬,朱曉勇,羅廣南,程繼貴,吳玉程.微量元素Nb、C強(qiáng)化W-Lu2O3復(fù)合材料的組織及性能研究[J].稀有金屬材料與工程,2017,46(9):2533~2538.[Zhang Jun, LuoLaima, Zhu Xiaoyong, Luo Guangnan, Cheng Jigui, Wu Yucheng. Research on microstructures and properties of W-Lu2O3 composite strengthened with Nb and C trace elements[J]. Rare Metal Materials and Engineering,2017,46(9):2533~2538.]
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  • 收稿日期:2015-05-25
  • 最后修改日期:2015-07-22
  • 錄用日期:2015-09-07
  • 在線發(fā)布日期: 2017-11-29
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