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燒結(jié)溫度對(duì)W-40vol.%ZrC性能與組織的影響
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中南大學(xué) 粉末冶金國(guó)家重點(diǎn)實(shí)驗(yàn)室

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通訊作者:

中圖分類號(hào):

TG 146.4

基金項(xiàng)目:

國(guó)家自然科學(xué)基金資助(項(xiàng)目號(hào)51474242和51404308) 和國(guó)家科技部重大專項(xiàng)(項(xiàng)目號(hào)2014GB115000)


Effect of sintering temperature on microstructure and properties of W-40vol%ZrC
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Affiliation:

State Key Laboratory for Powder Metallurgy, Central South University

Fund Project:

National Natural Science Foundation of china(grant numbers 51474242 and 51404308 ) and National Magnetic Confinement Fusion Program(grant numbers 2014GB115000 )

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    摘要:

    采用放電等離子燒結(jié)(SPS)和常壓氫氣燒結(jié)制備了W-40vol.%ZrC的復(fù)合材料,研究了燒結(jié)溫度對(duì)其密度、力學(xué)性能和微觀組織的影響。結(jié)果表明,采用SPS燒結(jié)能在低于常壓氫氣燒結(jié)200℃下,實(shí)現(xiàn)W-40vol.%ZrC的高相對(duì)密度和高強(qiáng)度和細(xì)晶組織。采用SPS燒結(jié)在1600℃時(shí)的相對(duì)密度、硬度和抗彎強(qiáng)度分別達(dá)到為98.56%、HRA78.1和501MPa,W和ZrC的平均晶粒度分別為3μm和1.5μm；而采用常壓氫氣燒結(jié)在1860℃燒結(jié)時(shí)達(dá)到最優(yōu)值,其相對(duì)密度、硬度和抗彎強(qiáng)度達(dá)到98.95%、HRA77.3和726MPa,W和ZrC的平均晶粒度分別為10μm和4.5μm。微觀組織分析顯示SPS燒結(jié)較常壓氫氣燒結(jié)制備W-40vol.%ZrC的ZrC相分布更加均勻細(xì)小,其能減少材料變形中由于ZrC團(tuán)聚造成應(yīng)力集中而引發(fā)的脆性斷裂。

    Abstract:

    W-40vol%ZrC composites was prepared by spark plasma sintering (SPS) and ordinary consolidation sintering respectively. The relative density, mechanical properties and microstructure were studied. The resules show that high relative density, high strength and fine grains structure can be achieved by SPS which is reduced 200℃ to the ordinary consolidation sintering. The relative density, hardness, bending strength of W-40vol%ZrC composites sintering at 1600℃ was 98.56%, HRA78.1 and 501MPa respectively. The average grain sizes of W and ZrC was 3μm and 1.5μm. O-W40ZrC had the optimun value sintering at 1860℃, the relative of density, hardness and bending strength was 98.95%, HRA77.3 and 726MPa. The average grain sizes of W and ZrC was 10μm and 4.5μm. Compared with ordinary consolidation sintering, the tungsten grain is more fine and ZrC particles is much more well-distributed prepared by spark plasma sintering, and the fine grains has a beneficical effect on fracture process.

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引用本文

李鵬飛,范景蓮,章曼,馮康杰,韓勇,田家敏.燒結(jié)溫度對(duì)W-40vol.%ZrC性能與組織的影響[J].稀有金屬材料與工程,2019,48(1):335~340.[lipengfei, fan jinglian, zhangman, fengkangjie, hanyong, tianjiamin. Effect of sintering temperature on microstructure and properties of W-40vol%ZrC[J]. Rare Metal Materials and Engineering,2019,48(1):335~340.]
DOI：10.12442/j. issn.1002-185X.20171160

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歷史
  • 收稿日期:2017-12-15
  • 最后修改日期:2018-01-07
  • 錄用日期:2018-04-04
  • 在線發(fā)布日期: 2019-02-18
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