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W含量及预热温度对Ti—W—C体系燃烧合成产物的影响研究
引用本文:李劲风,张鉴清,等.W含量及预热温度对Ti—W—C体系燃烧合成产物的影响研究[J].稀有金属材料与工程,2002,31(1):64-68.
作者姓名:李劲风  张鉴清
作者单位:1. 浙江大学,浙江,杭州,310027
2. 浙江大学,浙江,杭州,310027;中南大学,湖南,长沙,410083
3. 腐蚀与防护国家重点实验室,辽宁,沈阳,110015
基金项目:国家自然科学基金资助项目 (5 0 0 710 5 4 ),国家重点研究发展规划基金资助项目 (G19990 6 5 0 0 1)
摘    要:研究了W含量及预热温度对Ti-W-C体系燃烧合成产物相组成及粉末形貌的影响。研究结果表明,体系W含量减少,或燃烧之前进行预热,通过提高体系的燃烧温度,其燃烧反应机制由扩散-固溶机制转变为熔化-溶解-析出机制;结果,燃烧反应随之完全,有利于合成单相(Ti,W)C粉末,且产物粉末粒度增加,同时合成单相所需的预热温度随W含量增加而提高。

关 键 词:预热温度  Ti-W-C体系  燃烧合成  钨含量  碳化物
文章编号:1002-185X(2002)01-064-05
修稿时间:2000年1月16日

Study on The Effect of Tungsten Content and Preheat Temperature on Combustion synthesized Product in Ti-W-C System
Li Jinfeng,Zhang Zhao,Zhang Jianqing,Zheng Ziqiao,Xu Xiewen.Study on The Effect of Tungsten Content and Preheat Temperature on Combustion synthesized Product in Ti-W-C System[J].Rare Metal Materials and Engineering,2002,31(1):64-68.
Authors:Li Jinfeng  Zhang Zhao  Zhang Jianqing  Zheng Ziqiao  Xu Xiewen
Abstract:The effect of W content and preheat temperature on phase components and powder size of combustion synthesized product in Ti W C system were studied. With the decrease of W content, the combustion temperature is increased and the combustion reaction mechanism is changed to melt solution prepicitation from diffusion solution in solid state. Preheating mixtures would result in the same effect. As a result, the combustion reaction becomes complete, single phase (Ti, W)C is synthesized advantageously and the powder size increases with the decrease of W content and the increase of preheat temperature. Meanwhile, the necessary preheat temperature for synthesizing single phased(Ti, W)C increases with the increase of W content.
Keywords:W content  preheat temperature  Ti  W  C system  combustion synthesis
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