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  

Study on The Effect of Tungsten Content and Preheat Temperature on Combustion synthesized Product in Ti-W-C System

作　　者：李劲风[1] 张昭[1] 张鉴清[1] 郑子樵 徐协文 

机构地区：[1]浙江大学,浙江杭州310027 [2]腐蚀与防护国家重点实验室,辽宁沈阳110015

出　　处：《稀有金属材料与工程》2002年第1期64-68,共5页Rare Metal Materials and Engineering

基　　金：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.

关 键 词：预热温度 Ti-W-C体系 燃烧合成 钨含量 碳化物 

分 类 号：TB39[一般工业技术—材料科学与工程]