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TiCp/W金屬基復(fù)合材料的制備與性能研究
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北京科技大學(xué),景德鎮(zhèn)陶瓷學(xué)院,景德鎮(zhèn)陶瓷學(xué)院,北京科技大學(xué),北京科技大學(xué),北京科技大學(xué)

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國家自然科學(xué)基金 (項(xiàng)目號51162015),國際熱核聚變實(shí)驗(yàn)堆(ITER)計(jì)劃專項(xiàng)(2014GB123000)


Study on Preparation and Properties of TiCp/W Metal Matrix Composite
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University of Science and Technology Beijing,Jingdezhen Ceramic Institute,Jingdezhen Ceramic Institute,University of Science and Technology Beijing,University of Science and Technology Beijing,University of Science and Technology Beijing

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    摘要:

    采用滴定法,在偏鎢酸銨(AMT)飽和溶液與碳化鈦(TiC)微粉和分散劑組成的懸浮液中,滴入無水乙醇獲得AMT包覆碳化鈦前驅(qū)體;然后對前驅(qū)體進(jìn)行高純氫還原制備出鎢包覆TiC復(fù)合粉體,對復(fù)合粉體進(jìn)行了XRD物相和SEM形貌分析。結(jié)果表明,當(dāng)N,N-甲基甲酰胺(DMF)和聚乙二醇(PEG)作為TiC與AMT飽和溶液的分散劑,經(jīng)600 ℃保溫1 h和800 ℃保溫30 min H2還原,得到分散良好的類球形復(fù)合粉體。采用放電等離子體燒結(jié)(SPS)技術(shù)制得塊體樣品,對其進(jìn)行了SEM形貌分析,并測試了其相對密度和力學(xué)性能。結(jié)果表明,在1600 ℃,保溫2 min,SPS燒結(jié)后, TiC在基體中分布均勻,TiCp/W復(fù)合材料的相對密度達(dá)到94.6%,抗彎強(qiáng)度達(dá)到739 MPa,顯微硬度達(dá)到4.86GPa,斷裂韌性達(dá)到7.87MPa?m1/2。

    Abstract:

    The precursor of ammonium metatungstate(AMT) coated titanium carbide(TiC) were prepared by titration method, in which the suspension composed of the saturated solution of AMT, TiC micropowder and the dispersants was titrated with the anhydrous ethanol. The as-synthesized precursors were reduced in high-purity hydrogen atmosphere and then the tungsten coated TiC composite powder was prepared. The as-prepared powder was characterized by XRD and SEM. The results showed that the well-dispersed globularlike composite powders were produced when N,N-dimethyl formamide (DMF) and PEG used as the dispersant for TiC and saturated solution of AMT and the precursor reduced in the high-purity hydrogen atmosphere at 600 ℃ for 1h and 800 ℃ for 30 min. And the bulk samples were prepared by spark plasma sintering (SPS) and their SEM morphology, relative density and mechanical properties were investigated. The results showed that TiC particles were uniformly distributed in the matrix W when the samples sintered by spark plasma sintering (SPS) at 1600 ℃ for 2 min, that the relative density, flexural strength, micro-hardness and fracture toughness of the samples achieved 94.6 %, 739 MPa, 4.86GPa and 7.87MPa?m1/2, respectively.

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陳建華,劉維良,周華,燕青芝,郎少庭,葛昌純. TiCp/W金屬基復(fù)合材料的制備與性能研究[J].稀有金屬材料與工程,2017,46(1):242~246.[chen jianhua, Liu Weiliang, Zhou Hua, Yan Qinzhi, Lang Shaoting, Ge Changchun. Study on Preparation and Properties of TiCp/W Metal Matrix Composite[J]. Rare Metal Materials and Engineering,2017,46(1):242~246.]
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  • 收稿日期:2014-10-15
  • 最后修改日期:2015-02-08
  • 錄用日期:2015-03-25
  • 在線發(fā)布日期: 2017-03-16
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