新型热障涂层用陶瓷材料及涂层性能计算机数值模拟研究进展

发布时间：2018-02-22 13:14

本文关键词： 热障涂层新型陶瓷材料热物理性能热应力　出处：《表面技术》2016年09期 　论文类型：期刊论文

【摘要】：随着先进涡轮发动机性能的进一步提升,寻求低热导率、高热膨胀系数的新型陶瓷材料已经成为热障涂层领域的研究热点。计算机数值模拟在新型陶瓷及其涂层性能研究方面发挥了重要作用。综述了新型热障涂层陶瓷材料相结构、热物理性能、力学性能和对应涂层隔热性能、涂层有效热导率及涂层热应力等几个方面国内外计算机数值模拟研究成果,并指出了以上几个方面计算机数值计算研究存的不足。未来材料物理性能计算应当多研究元素掺杂及新材料相结构随温度和压力的变化关系,开发新的数学模型提高热导率、热膨胀系数及各种力学性能参数的计算精度。涂层的隔热性能和有效热导率方面应当进一步系统化,将各种涂层结构、涂层显微组织、材料组成及导热方式的影响考虑在内,开发新的计算方法并提高计算精度;涂层的冲击和残余热应力计算中未引入基体条件(材质、尺寸、粗糙度、温度)、涂层结构、界面形貌、涂层缺陷、单层厚度、服役环境等方面的影响,并应注重与实验结果进行对比。
[Abstract]:With the further improvement of the performance of advanced turbine engines, the search for low thermal conductivity, New ceramic materials with high thermal expansion coefficient have become a hot topic in the field of thermal barrier coatings. Computer numerical simulation plays an important role in the study of new ceramics and their coating properties. The phase structure of new thermal barrier coatings ceramic materials is reviewed. The thermal physical properties, mechanical properties and thermal insulation properties of the coating, the effective thermal conductivity of the coating and the thermal stress of the coating are studied by computer numerical simulation at home and abroad. It also points out the deficiency of the computer numerical calculation in the above aspects. In the future, the physical properties of materials should be calculated by studying the relationship of element doping and phase structure of new materials with temperature and pressure, and developing new mathematical models to improve the thermal conductivity. The calculation accuracy of thermal expansion coefficient and various mechanical property parameters. The thermal insulation and effective thermal conductivity of the coating should be further systematized, taking into account the influence of the coating structure, coating microstructure, material composition and thermal conductivity. Development of a new calculation method and improvement of calculation accuracy. No matrix conditions (material, size, roughness, temperature, coating structure, interface morphology, coating defect, single layer thickness) were introduced in the calculation of the impact and residual thermal stress of the coating. The effect of service environment should be compared with the experimental results.
【作者单位】：河南工程学院计算机学院;郑州铁路职业技术学院电气工程系;河南工程学院机械工程学院;
【基金】：国家自然科学基金(U1304512) 河南省高校科技创新人才支持计划项目(13HASTIT018) 河南省科技攻关计划项目(132102210142) 河南省博士后科研资助项目(2014069)~~
【分类号】：TG174.4

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