Microstructure and properties of Al-60wt.%Si composites prepared by powder semi-solid squeeze | |
Liu, Junwu3; Jiang, Daochuan3; Zhou, Xingxing3; Wang, Yonghong3; Liu, Xuemin3; Xin, Hongxing2; Jiang, Yang3; Yang, Lei1; Zhang, Yujun1; Huang, Zhigang1 | |
刊名 | POWDER TECHNOLOGY |
2019-02-01 | |
卷号 | 343期号:无页码:95-100 |
关键词 | Powder semi-solid squeeze Particle size Al-Si composites Passivation Flexural strength Thermal conductivity |
ISSN号 | 0032-5910 |
DOI | 10.1016/j.powtec.2018.11.011 |
英文摘要 | Al-60wt.%Si composites were successfully prepared by semi-solid squeezing powder mixture of Al and Si at 700 degrees C. The appearance of about 50wt.% Al-Si metal liquid results that less than 4-5 MPa pressure can squeeze the Al-Si powder mixture to near full density at vacuum condition. The effects of Si particle size on the microstructure and properties of Al-60wt.%Si were investigated. The results show that the composites are consisted of only Si and Al. Si particles distribute evenly in aluminum matrix. Al matrix exhibits a certain preferred orientation under the condition of directional solidification. Si particles with 5 mu m size tend to be aggregated into locally interconnected particles and can be effectively passivated. As Si particle size ranges from 10 to 20 mu m, the corner passivation effect for Si particles is gradually suppressed. The fracture morphology of Al-60wt.%Si is composed of cleavage platforms of Si grains and fine tearing ridges of Al which tightly wraps Si grains. With the increase of Si particle size from 5 to 20 pm, the flexural strength of Al-60waSi decreases from 270 MPa to 223 MPa, the thermal conductivity increase from 128 to 136 W.m (-1). degrees C-1, and the average coefficient of thermal expansion from ambient temperature to 400 degrees C ranges from 9.49 to 9.97 x 10(-6 )degrees C-1. (C) 2018 Elsevier B.V. All rights reserved. |
资助项目 | Key Research and Development Project of Anhui Province of China[1704a0902023] |
WOS关键词 | MECHANICAL-PROPERTIES ; VOLUME-FRACTION ; THERMAL-CONDUCTIVITY ; PARTICLE-SIZE ; EXPANSION ; PRESSURE ; ALUMINUM ; BEHAVIOR ; SILICON ; INFILTRATION |
WOS研究方向 | Engineering |
语种 | 英语 |
出版者 | ELSEVIER SCIENCE BV |
WOS记录号 | WOS:000459527100011 |
资助机构 | Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China ; Key Research and Development Project of Anhui Province of China |
内容类型 | 期刊论文 |
源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/42052] |
专题 | 合肥物质科学研究院_中科院固体物理研究所 |
通讯作者 | Liu, Junwu; Xin, Hongxing |
作者单位 | 1.China Elect Technol Grp Corp, Inst 43, Hefei, Anhui, Peoples R China 2.Chinese Acad Sci, Key Lab Mat Phys, Inst Solid State Phys, Hefei, Anhui, Peoples R China 3.Hefei Univ Technol, Sch Mat Sci & Engn, Hefei, Anhui, Peoples R China |
推荐引用方式 GB/T 7714 | Liu, Junwu,Jiang, Daochuan,Zhou, Xingxing,et al. Microstructure and properties of Al-60wt.%Si composites prepared by powder semi-solid squeeze[J]. POWDER TECHNOLOGY,2019,343(无):95-100. |
APA | Liu, Junwu.,Jiang, Daochuan.,Zhou, Xingxing.,Wang, Yonghong.,Liu, Xuemin.,...&Feng, Dong.(2019).Microstructure and properties of Al-60wt.%Si composites prepared by powder semi-solid squeeze.POWDER TECHNOLOGY,343(无),95-100. |
MLA | Liu, Junwu,et al."Microstructure and properties of Al-60wt.%Si composites prepared by powder semi-solid squeeze".POWDER TECHNOLOGY 343.无(2019):95-100. |
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