Fe-Mo合金高温硫化产物中的固态反应及传质  

SOLID STATE REACTION AND MASS TRANSFER FOR SULFIDE SCALE ON Fe Mo ALLOY DURING SULFIDATION

作　　者：刘海平[1,2] 齐慧滨[1,2] 何业东[1,2] 朱日彰[1,2] 

机构地区：[1]北京科技大学表面科学与腐蚀工程系 [2]北京航空材料研究院腐蚀防护研究室

出　　处：《腐蚀科学与防护技术》1998年第5期269-273,共5页Corrosion Science and Protection Technology

基　　金：国家自然科学基金;IET教育基金;金属腐蚀与防护国家重点实验室资助项目

摘　　要：以ＸＲＤ、ＳＥＭ／ＷＤＳ和ＴＥＭ分析结果为依据，对Ｆｅ－Ｍｏ（Ｍｏ＝２０％～５７％）二元合金在硫蒸气中（ＰＳ２＝１～５０ｋＰａ）高温硫化产物层的相组成及膜层中的有关固态反应进行了探讨，绘出了可能的稳定相图，分析了主要硫化产物的缺陷结构特点及其对硫化传质的影响．认为Ｆｅ、Ｍｏ混合硫化物中的缺陷密度较高，对传质的阻力较小；而ＭｏＳ２层缺陷密度小，对阻止硫化反应物传质起主要作用．A discussion has been made on the solid state reaction and scale structure for Fe Mo alloy, according to the results through XRD, SEM/WDS and TEM observations. A hypothetical stable phase diagram is presented. The correlation between the defect properties of the formed sulfides and the mass transfer process was also elucidated. Inside the complicated sulfides of Fe and Mo existed higher density of defect, thus these phases did not serve as the main phases to resist the mass transfer during sulfidation. Instead, the MoS 2 layer with much less defect density was the most important product to deter sulfidation.

关 键 词：Fe-Mo合金 硫化物 缺陷结构 固态反应 传质 高温 

分 类 号：TG172.82[金属学及工艺—金属表面处理]