铸造技术2018，Vol.39Issue(1)：189-193,5.DOI:10.16410/j.issn1000-8365.2018.01.051
自蔓延TiC/Ni功能梯度涂层热疲劳性能研究
Research on Thermal Fatigue Resistance of TiC/Ni Functionally Gradient Coating by SHS/PHIP
摘要
Abstract
The TiC/Ni functionally gradient coatings on H13 steel surface were prepared by self-propagating high temperature synthesis and pseudo hot isostatic pressing (SHS/PHIP).The 600 thermal fatigue cycle tests were carried out on the coating by the self-made thermal fatigue test equipment.The coating microstructures were characterized by SEM/EDS.The results show that the cracks initiate at the tips and defects of the surface layer and interlayer,and propagate to the transitional layer of 25 ℃ and 100 ℃ coatings perpendicular to the interface.25 ℃ coating falls off in transition layer,and 100 ℃ coating appears transition layer cracking.The cracks of 200 ℃ and 300 ℃ coatings propagate to the substrate interface.The crack propagation occurs within the TiC grains of the surface layer and interlayer,which belongs to the typical characteristics of brittle fracture of transgranular fracture.关键词
SHS/PHIP/TiC/Ni/梯度功能涂层/热疲劳Key words
SHS/PHIP/TiC/Ni/functionally gradient coating/thermal fatigue分类
矿业与冶金引用本文复制引用
赵川翔,潘成刚,吴竹,常庆明..自蔓延TiC/Ni功能梯度涂层热疲劳性能研究[J].铸造技术,2018,39(1):189-193,5.基金项目
国家自然科学基金资助项目(51375353) （51375353）
