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is deduced and the result illustrates that useful wrinkles are easier to be obtained for tube with higher strain hardening coefficient value and tubular part with smaller expansion ratio. Key words: warm... shape and amount might be useful to increase the expansion ratio limit in warm tube hydroforming. The higher the strain hardening coefficient value of a material, the easier the useful wrinkles can......
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advantageous physical and mechanical characteristics, including low coefficient of thermal expansion (6.9×10-6-8.7×10-6/K), high thermal conductivity (118-127 W/(m·K)), low density (2.421×103-2.465×103... with gold finishes and soldered with Sn-Pb alloy without any difficulty. Key words: spray forming; Si-Al alloy; electronic packaging material; coefficient of thermal expansion ......
of semiconductor, it is important that the thermal expansion coefficient of heat sink materials approximates to that of semiconductor chip and peripheral material. In addition, high thermal conductivity and densification also is required[1-3]. The Mo/Cu composites have excellent thermal conductivity, electric conductivity and tailorable coefficient of thermal expansion. Recently, they were......
for electronic packaging were given at the end. Key words: electronic packaging; metal matrix composites; thermal conductivity; thermal expansion coefficient 随着电子工业迅猛发展,现代电子信息技术对电子产品的小型化,便携化,多功能,高可靠和低成本提出了越来.... Effects of thermal processing on thermal expansion coefficient of a 50 vol.% SiCp/Al composite[J]. Materials Chemistry and Physics, 2001, 72(1): 42-47. [11] CHU Ke, LIU Zhao-fang, JIA Cheng-chang......
%~65.0%; MgO, 0~15.2%; CaO, 0~15.2%; SrO, 0~15.2%; BaO, 0~15.2%; Na2O, 0~15.6%; K2O, 0~15.6%. The relationship between the composition and the thermal expansion coefficient of the glass was investigated by comparing the thermal expansion coefficients of the glass with different chemical compositions. The results show that the thermal expansion coefficient of the glass increases sharply when......
(Y0.25Yb0.25Er0.25Lu0.25)2(Zr0.5Hf0.5)2O7: A defective fluorite structured high entropy ceramic with low thermal conductivity and close thermal expansion coefficient to Al2O3Zifan Zhao1,2,Heng Chen2,Huimin Xiang2,Fu-Zhi Dai2,Xiaohui Wang3,Zhijian Peng1,Yanchun Zhou21. School of Engineering and Technology, China University of Geosciences2. Science and Technology on Advanced Functional Composite......
% ytrria) were studied. The n-LZ had a thermal expansion coeffinanofication was an efficient way to increase the toughness and thermal expansion coefficient of LZ. The composite LZ-5-superhigh pressure (SHP). 关键词:ceramics; nanostructure; fracture toughness; thermal expansion; [全文内容正在添加中] ......
">Keyword: SHS; SiCp/Al composites; coefficient of thermal expansion; thermal conductivity; Received: 2000-03-08 SiCp/Al基复合材料由于制造工艺简单, 原材料价格便宜, 密度小, 且具有可调的线膨胀系数和良好的导热性能, 在电子封装...膨胀系数见表1. 由表中看出, 在室温至400 ℃的温度范围内, 试样的热膨胀系数比较小. 表1 试样在各温度范围内的平均线膨胀系数 Table 1 Average coefficient of thermal expansion of composites (10-6·K-1) Temperature range/℃ 1......
composites range from 167.3 to 215.4 W/(m?K), decreasing with increasing volume fraction TiB2. Key words: TiB2p/Cu composites; densification; coefficient of thermal expansion; thermal conductivity ... materials should have coefficient of thermal expansion(CTE) matching the ceramic substrates such as alumina, beryllia or aluminum nitride or semiconductors such as silicon or gallium arsenide to avoid......
