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conductivity of SiC/Al composites at room temperature ranges from 136 W/(m?K) to 118 W/(m?K) and its mean linear coefficient of thermal expansion (room temperature to 100 ℃) ranges from 9.98×10-6 K-1..., 陈续东. 低膨胀,超高模量铝基复合材料及其无压浸渗制备加工技术[J]. 中国有色金属学报, 2004, 14(S3): 33-36.CUI Yan, CHEN Xu-dong. Aluminum matrix composites with low coefficient of thermal expansion and ultra-high modulus and their near......
,and the fracture was caused by the desorption of SiC particles from matrix alloy.The coefficient of thermal expansion(CTE) of the SiCp / Al composites in the range of 20 and 100 ℃ was determined as 16.67×10-6...Mechanical and Thermal Expansion Properties of SiC_p/ZAlSi9Mg Composites Produced by Centrifugal Casting王开,JIANG Tao,HUANG Zhili,XUE Hansong,YANG Dazhuang,ZHU ZizongCollege of Materials Science......
and dry sand mold 4.3 Mathematical model of IHTC The main factor influencing IHTC is the temperature of casting and sand mold on the contact surface. Moreover, the thermal expansion coefficient... is the temperature of casting surface, TL is liquidus temperature, is one temperature less than solidus temperature TS, and its value should be determined by the thermal expansion coefficient......
in the vicinity of the martensitic transformation. The maximal negative thermal expansion coefficient occurs in alloy with x of 1.0 is about -139.84×10-6 K-1. This abnormal negative thermal expansion...Ni含量基本上无直接关系,很可能是Ni含量变化太小的缘故；3) 对比两相的热膨胀系数可知,马氏体相的热膨胀系数约为奥氏体相的1.34~2.05倍. 2.3.3 马氏体相变附近的热膨胀特性 表2 合金Ni54+xMn19-xGa27在马氏体相和奥氏体相的平均热膨胀系数 Table 2 Average thermal expansion coefficients......
of thermal expansion (7.5×10-6 ℃-1) and high thermal conductivity ranging from 126 to 157.9 W/(m·℃). With increasing temperature, the specific capacity and the average coefficient of thermal expansion increases monotonically, the thermal diffusivity and the thermal conductivity decrease gradually. The specific capacity, average coefficient of thermal expansion, thermal diffusivity and the thermal......
Crystal structure and thermal expansion of perovskites containing uranium (VI) and rare-earth elements Nikolai Chernorukov1,Aleksandr1,Anna Ershova1 (1.Nizhny Novgorod State University,Gagarin... was discovered. By means of high-temperature X-ray diffraction, phase transitions were studied and thermal expansion coefficients were determined. Key words:perovskite; uranium; X-ray diffraction; Rietveld......
of thermal expansion coefficient of 7075-O,7075-FSPed and CNTs/7075 composite samples with the temperature 热膨胀是固体材料受热后晶格点阵的非简谐振动加剧而引起的容积膨胀.对复合材料而言,材料的热膨胀系数(CTE)是由基体的热膨胀系数,增强相的热膨胀系数以及增强体通过基体与增强体界面对基体的制约程度决定...沉淀相MgZn2弥散分布于材料中,MgZn2的热膨胀系数小于Al,进一步对基体材料膨胀起制约作用,因此材料的热膨胀系数增长幅度减小. 图5 不同试样热膨胀系数在不同温度区间的平均增长率 Fig. 5 Average growth rate of thermal expansion coefficient among different temperature ranges......
are always found in aluminium composites reinforced with micron particles because of large thermal mismatch stress generated by coefficient of thermal expansion (CTE) difference between the ceramic particles... and designable thermal expansion property, excellent thermal conductivity and low density, have obtained extensive application in the aviation field[3-4]. Recently, the Sip/Al composites have been......
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降低堇青石材料热膨胀系数的途径 朱凯1,张锐1,陈德良1,杨道媛1,毋娟1 (1.郑州大学材料科学与工程学院,郑州,450001) 摘要:堇青石材料热膨胀系数低,是优良的高温抗热震材料,但我国目前生产的堇青石材料热膨胀系数还有待进一步提高.综述了降低堇青石材料热膨胀系数的各种途径,包括调整材料的化学矿物组成,优化制备工艺和后期处理等,指出今后发展的方向是利用负膨胀材料开发低膨胀乃至零膨胀的堇青石材料,以期促进优质堇青石材料的研究与开发. 关键词:堇青石; 热膨胀系数; 制备工艺; 后期处理; 负膨胀材料; cordierite; thermal expansion coefficient; preparation process; post processing; negative expansion materials; [全文内容正在添加中] ......
