摘要
火焰喷涂合成技术是可用于制备金属陶瓷涂层的新技术该工艺的实施，需要对Ｆｅ－Ｔｉ－Ｃ系进行热力学分析，了解合成目标产物 Ｆｅ／ＴｉＣ的热力学条件通过利用计算相图技术计算 Ｆｅ－Ｔｉ－Ｃ系的相平衡及绝热燃烧温度 Ｔａｄ；重点讨论输入焓Ｈ（氧乙炔火焰功率）对体系Ｔａｄ的影响，结果发现，当Ｈ＝０时，满足体系自蔓延高温合成反应热力学条件的Ｆｅ含量＜５７（质量分数．％，下同）；在火焰喷涂合成过程中，输入焓的存在使体系满足热力学的条件放宽， Ｆｅ含量可高达 ８０．实验结果与计算结果吻合得较好．
The flame spray synthesis can be used to produce cermet composite coatings, such as TiC-Fe coating. To obtain the desired product, it is necessary to analysis the thermodynamics of Fe-Ti-C system. The equilibrium phases and adiabatic temperature (Tad) of Fe-Ti-C system are calculated by calculation of phase diagram (CALPHAD) method. It is focused on the influence of the extrinsic enthalpy(of oxygen--acetylene flame) on Tad. It is revealed that when the extrinsic enthalpy H=0, Fe-Ti-C system can be ignited only if Fe<57 (mass fraction,%). However, due to the existance of extrinsic enthalpy during flame spray process, the Fe-Ti-C system with high Fe content up to 80 can be also ignited on the thermodynamical calculation. The calculated results coincided well with the experiment results.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第11期1209-1212,共4页
Acta Metallurgica Sinica
基金
国家863计划资助项目!715-009-0130
关键词
火焰喷涂合成
TiC-Fe涂层
输入焓
SHS
flame spray synthesis, self-propagation high temperature synthesis (SHS), CALPHAD method, thermodynamic analysis, extrinsic enthalpy
