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个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职：研究生院常务副院长
其他任职：辽宁省凝固控制与数字化制备技术重点实验室主任
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：材料加工工程
办公地点：研究生院；材料科学与工程学院
联系方式：tmwang@dlut.edu.cn
电子邮箱：tmwang@dlut.edu.cn
Manipulating the particle distribution of in situ TiB2p/Al composites via acoustic vibration and cooling rate
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论文类型：期刊论文
发表时间：2020-03-01
发表刊物：MATERIALS LETTERS
收录刊物：EI、SCIE
卷号：262
ISSN号：0167-577X
关键字：Metallic composites; Solidification; Particle dispersion; Ultrasonic vibration; Cooling rate
摘要：In situ TiB2p/Al composites were pre-fabricated by mixed halide salt route. The composites were remelted and subjected to both ultrasonic vibration treatment (UVT) and different solidification conditions to see if it is possible to manually manipulate the particle distribution. The results indicate that except for the coarse Al3Ti (I-type) particles embed in the center of a grain, most particles are distributed along the grain boundary to form a network structure. Microstructural analysis of the raw material has further distinguished the latter particles into two categories: blocky TiB2 particles (II-type) of several microns depicting the grain boundary, and smaller particles (Al3Ti and TiB2, III-type) of a few hundred nanometers in the vicinity of the II-type particles. UVT widens the area of smaller particles adjacent to the grain boundaries, while faster cooling facilitates the engulfment of III-type particles inside alpha-Al grains. (C) 2019 Elsevier B.V. All rights reserved.