Effect of Graphite Addition on Microstructure, Mechanical Properties and Thermal Properties of Injection Molded AZ91D Alloy

被引：0
作者：
Hideshima Y. [1 ,2 ]
Maeda F. [2 ]
Fukuta T. [3 ]
Ozaki K. [3 ]
机构：
[1] Course of Advanced Systems Engineering, Graduate School of Computer Science and Systems Engineering, Okayama Prefectural University, Soja
[2] Process Technology Development Department, Technology Development Division, Seiko Epson Corp., Suwa
[3] Department of Systems Engineering, Faculty of Computer Science and Systems Engineering, Okayama Prefectural University, Soja
来源：
Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals | 2022年 / 86卷 / 12期
关键词：
binder; coefficient of thermal expansion; magnesium–base composite; rule of mixtures; thermal conductivity; Young’s modulus;
D O I：
10.2320/jinstmet.J2022031
中图分类号：
学科分类号：
摘要：
Magnesium chips were coated with a high concentration of graphite using a binder, and then used as the raw material for thixomolding. The microstructure of the magnesium injection–molded product with the addition of graphite exhibited a dispersion of needle–like graphite. No significant voids were observed at interfaces between the graphite and matrix. The addition of more than 0.5 mass％ graphite decreased the proof stress and tensile strength of the injection–molded products. The Young’s modulus of graphite–added products showed a tendency to decrease with increasing addition of graphite, which was consistent with the lower limit of the rule of composites. Compared to AZ91D, the thermal conductivity of the 6.9 mass％ graphite–added product was increased, and the coefficient of linear thermal expansion was decreased. Both were within the ranges where the rules of mixtures were satisfied. © 2022 The Japan Institute of Metals and Materials.
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页码：237 / 244
页数：7
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