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SYNTHESIS OF ZrC-ZrB_2 COMPOSITE POWDERS BY PIRAC METHOD

机译：PIRAC法合成ZrC-ZrB_2复合粉

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摘要

ZrC-ZrB_2 composite ceramic powders are synthesized by a powder immersion method using Zr and B_4C powders as reactants. Phase composition and microstructure of the treated powders are characterized by employing X-ray diffraction and scanning electron microscopy. Results show that contents proportion of the produced ZrC and ZrB_2 varies with proceeding temperatures and the initial powders composition. Thermodynamics analysis and experimental results indicate that the mole ratio of Zr to B_4C should be appreciably small than 3:1 and treated at 900 ℃ for 2h is more suitable to make the Zr and B_4C completely reacted and without ZrO_2 remained.
机译：ZrC-ZrB_2复合陶瓷粉体是采用Zr和B_4C粉末作为反应物，通过粉末浸渍法合成的。通过使用X射线衍射和扫描电子显微镜来表征处理的粉末的相组成和微观结构。结果表明，所产生的ZrC和ZrB_2的含量比例随温度和初始粉末组成而变化。热力学分析和实验结果表明，Zr与B_4C的摩尔比应小于3：1，并在900℃下处理2h更适合使Zr与B_4C完全反应且不残留ZrO_2。

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  • 会议地点 XIan(CN)
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    Shoujun Wu; Yiguang Wang; Damning Gui;

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    College of water resources and architectural engineering, Northwest AF University, Yangling Shaanxi, 712100, People's Republic of China;

    National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi'an Shaanxi 710072, People's Republic of China;

    College of water resources and architectural engineering, Northwest AF University, Yangling Shaanxi, 712100, People's Republic of China;

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