Structural Evolution During Mechanical Milling of Bimodal-Sized Al_2O_3 Particles Reinforced Aluminum Matrix Composite

作     者：Ke Zhao Dan Tang Jin-Ling Liu Yi-Guang Wang 

作者机构：Science and Technology on Thermostructural Composite Materials Laboratory Northwestern Polytechnical University State Key Laboratory of Traction Power School of Mechanics and Engineering Southwest Jiaotong University Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province Southwest 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4期

页      面：423-430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] 

基　　金：the financial support from the State Key Laboratory of Traction Power(Grant No.2015TPL_Z01) the State Key Laboratory of Solidification Processing(Grant Nos.82-TZ-2013 and SKLSP201609) the Fundamental Research Funds for the Central Universities(Grant No.2682017CX090) the‘‘111’’Project(B08040) 

主　　题：Bimodal-sized Aluminum matrix composite Mechanical milling Grain refinement 

摘      要：Hybrid aluminum matrix composite powders reinforced with bimodal-sized Al2O3 particles were synthesized by mechanical *** different approaches were investigated for the addition of submicron-and nano-sized Al2O3 particles to the aluminum powders,It was observed that the simultaneous addition of bimodal-sized Al2O3 particles to the aluminum powders resulted in an equiaxed morphology of the composite powders and the average particle size stabilized after 5 h of milling,indicating that the presence of bimodal-sized particles has greater effect on accelerating milling process as compared to nano-sized particles;the grain size of the aluminum matrix in composite powders was reduced to under 40 nm,approximate to the value obtained in the separate addition case,while a lower rate of refining was observed due to hindrance of submicron-sized particles on the interactions between nano-sized particles and the aluminum matrix.