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Publication
Featured researches published by Shaohua Wei.
Acta Metallurgica Sinica (english Letters) | 2014
Junhui Nie; Jianzhong Fan; Shaoming Zhang; Shaohua Wei; Tao Zuo; Zili Ma; Zhaobing Xiang
Abstract15xa0vol% silicon carbide particle (SiCp)-reinforced 2009Al matrix (15xa0vol% SiCp/2009Al) composites were fabricated by hot isostatic pressing (HIP) and hot extrusion processes. The tensile and fracture properties of 15xa0vol% SiCp/2009Al were studied. The results showed that hot extrusion increased the ultimate tensile strength (UTS), yield strength (YS), elongation (EL), reduction in area (RA), and fracture toughness of the composites. The heat treatment resulted in the increase in UTS, YS, and fracture toughness, but a decrease in EL and RA. Both hot extrusion and heat treatment had negligible effects on elastic modulus (E). With the increase of SiCp size, the UTS, YS, and E decreased, but the EL and RA increased. The fracture toughness increased first and then decreased with increasing SiCp size, and when the SiCp size was about 7xa0μm, the composites obtained the maximum fracture toughness value of 31.74xa0MPaxa0m1/2.
Rare Metals | 2016
Yanqiang Liu; Jianzhong Fan; Xin-Xiang Hao; Shaohua Wei; Junhui Nie; Zili Ma; Ming-Kun Liu; Ya-Bao Wang
Silicon/aluminum (Si/Al) composite is a kind of lightweight electronic packaging material that received a lot of attention in the past 20xa0years. In this paper, a series of Si/Al composites with lowered coefficient of thermal expansion (CTE) and high thermal conductivity were produced by powder metallurgy (PM). The Si/Al composites are fully dense and have fine Si particles uniquely distributed within pure Al matrix. Three 50%Si/Al composites were designed to have strength in the range of 185–290xa0MPa to meet different demands, while the other properties keep invariable. Fracture toughness of the composites is measured to be 9–10xa0MPa·m1/2. The composites were machined to 50%Si/Al housings and 27%Si/Al lids. Both the hermeticities of housings before and after laser-beam-welding sealing are determined. The measured leak rate of composites and sealed housings is in magnitude order of 1xa0×xa010−10 and 1xa0×xa010−9xa0Pa·m3·s−1, respectively, suggesting high hermeticity. The good hermeticity is attributed to the full dense materials, good weldability, and extremely low weld porosity. The present Si/Al composites are expected to be extensively used in highly hermetic electronic packages.
Archive | 2011
Zili Ma; Jianzhong Fan; Tao Zuo; Shaohua Wei; Yanqiang Liu
Archive | 2012
Shaohua Wei; Jianzhong Fan; Zili Ma; Tao Zuo; Yanqiang Liu
Archive | 2010
Jianzhong Fan; Yanqiang Liu; Zili Ma; Shaohua Wei; Tao Zuo
Archive | 2011
Yanqiang Liu; Jianzhong Fan; Zili Ma; Tao Zuo; Shaohua Wei
Rare Metals | 2015
Zhaobing Xiang; Junhui Nie; Shaohua Wei; Tao Zuo; Jianzhong Fan
Archive | 2012
Tao Zuo; Zili Ma; Shaohua Wei; Yanqiang Liu; Xikui Liu
Archive | 2011
Tao Zuo; Zili Ma; Yanqiang Liu; Shaohua Wei
Archive | 2010
Jianzhong Fan; Zili Ma; Shaohua Wei; Tao Zuo