原位合成TiB和TiC增强钛基复合材料热力学  

THERMODYNAMIC RESEARCH ON IN SITU FORMATION OF TiB AND TiC REINFORCED TITANIUM MATRIX COMPOSITES

作　　者：吕维洁[1,2] 张小农[1,2] 张荻 卞玉君[1,2] 方平伟 施忠良[1,2] 吴人洁 

机构地区：[1]上海交通大学金属基复合材料国家重点实验室 [2]上海钢铁研究所钛合金分所

出　　处：《中国有色金属学报》1999年第2期220-224,共5页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金

摘　　要：根据热力学理论编程计算了钛与Ｂ４Ｃ反应的反应生成焓ΔＨ与Ｇｉｂｂｓ自由能ΔＧ以及反应式（ｘ＋５）Ｔｉ＋Ｂ４Ｃ＝ｘＴｉ＋４ＴｉＢ＋ＴｉＣ的绝热温度。计算结果表明：钛与Ｂ４Ｃ反应释放出大量热，反应能自发维持，而过量钛与Ｂ４Ｃ反应更易生成ＴｉＢ和ＴｉＣ增强体。由于钛作为稀释剂吸收热量，随着过剩钛含量的增加，反应的绝热温度逐渐下降，过剩钛完全熔解的初始温度逐渐升高。Reaction formation enthalpy H, Gibbs free energy G and adiabatic temperature of reaction between Ti and B4C were calculated using thermodynamic theory. The results showed that the reaction between Ti and B4C releases much heat, TiB and TiC reinforcer are favourable to synthesize by the reaction between excessive Ti and B4C, adiabatic temperature will decrease and initial temperature which excessive titanium is absolutely melted will increase with excessive titanium increasing.

关 键 词：生成焓 钛基 复合材料 原位合成 热力学 

分 类 号：TB333[一般工业技术—材料科学与工程]