Thermal Properties of Mg–Al/AlN Composites Fabricated by Powder Metallurgy

作     者：Jie Chen Chong-Gao Bao Zhi-Wei Liu Ben-Shuang Sun Yong-Chun Shu Qing-Kui Li 

作者机构：Henan Province Industrial Technology Research Institute of Resources and MaterialsZhengzhou University State Key Laboratory for Mechanical Behavior of MaterialsSchool of Materials Science and EngineeringXi’an Jiaotong University 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2018年第31卷第6期

页      面：641-649页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

主　　题：Magnesium matrix composite Microstructure Thermal diffusivity Thermal expansion Mixing 

摘      要：Magnesium matrix composites reinforced with AlN particles were fabricated by the powder metallurgy *** mixing methods were used in this study to control the distribution of Al N *** microstructure,thermal diffusivity and thermal expansion of the Mg–Al/Al N composites using different mixing methods were *** results showed that the intergranular and intragranular distributions of Al N particles were obtained,respectively,by controlling the mixing *** composite with intragranular particles exhibited lower thermal diffusivity because of the existences of more interfaces,defects and grain boundaries,which acted as scattering centers and reduced the mean free path of electrons and *** existence of Al N particles lowered the coefficient of thermal expansion（CTE）and enhanced the dimensional stability of the *** the use of the improved mixing method further reduced the CTE of Mg–Al/Al N composites.