个人信息Personal Information
教授
博士生导师
硕士生导师
性别:男
毕业院校:大连理工大学
学位:博士
所在单位:材料科学与工程学院
学科:材料表面工程
办公地点:Room 218, School of Materials Science and Engineering
联系方式:0411-84707254
电子邮箱:xpzhu@dlut.edu.cn
Research on ZrO2 thermal barrier coatings modified by high-intensity pulsed ion beam
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论文类型:期刊论文
发表时间:2008-04-01
发表刊物:CHINESE PHYSICS LETTERS
收录刊物:SCIE、ISTIC、CSCD
卷号:25
期号:4
页面范围:1266-1269
ISSN号:0256-307X
摘要:We report a modification method for ZFO(2) thermal barrier coatings (TBCs) by high-intensity pulsed ion beam (HIPIB) irradiation. Based on the temporal and spatial distribution models of the ion beam density detected by Faraday cup in the chamber and the ions accelerating voltage, the energy deposition of the beam ions in ZFO(2) is calculated by Monte Carlo method. Taking this time-dependent nonlinear deposited energy as the source term of two-dimensional thermal conduction equation, we obtain the temporal and spatial ablation process of ZFO(2) thermal barrier coatings during a pulse time. The top-layer TBC material in thickness of about 0.2 mu m is ablated by vaporization and the coating in thickness of 1 mu m is melted after one shot at the ion current density of 200A/cm(2). This calculation is in reasonable agreement with those measured by HIPIB irradiation experiments. The melted top coat becoming a dense modification layer clue to HIPIB irradiation seals the gaps among ZFO(2) crystal clusters, and hence barrels the direct tunnel of oxygen.