Preparation of ZrB2 based composites by reactive melt infiltration at relative low temperature

Preparation of ZrB2 based composites by reactive melt infiltration at relative low temperature
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低温反应熔渗制备ZrB2基复合材料

DOI:
10.1016/j.matlet.2011.06.070
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发表时间:
2011-10
期刊:
影响因子:
3
通讯作者:
王松
王松
中科院分区:
材料科学3区
文献类型:
--
作者:
王松

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采用新型反应熔体渗透工艺制备了 ZrB2 基复合材料。多孔硼棒用作预制件并被低熔点Zr2Cu金属间化合物渗透。热力学计算表明,B可以在低至1100℃的温度下与液态Zr2Cu反应形成ZrB2。通过将两种材料在真空中加热至 1200°C 3 小时来制备复合材料。利用 XRD 和 SEM 对所得复合材料进行了研究。经鉴定,ZrB2 是主要成分。复合材料的弯曲强度为414.3MPa,弯曲模量为183.6GPa,断裂韧性为5.5MPam1/2。
ZrB2based composites were prepared by a novel reactive melt infiltration process. The porous boron bars were used as preforms and infiltrated by the low melting Zr2Cu intermetallic compound. Thermodynamics calculations revealed that B could react with liquid Zr2Cu to form ZrB2as low as 1100°C. Composites were prepared by heating the two materials to 1200°C for 3h in vacuum. The resultant composites were studied with XRD and SEM. ZrB2was identified to be the main constituent. The composites had a flexural strength of 414.3MPa, a flexural modulus of 183.6GPa, and a fracture toughness of 5.5MPam1/2.
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