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Effect of Extrusion Forming on Compressive Strength of Al_(18)B_4O_(33)w/Mg Composites () 摘要:The aluminum borate whisker reinforced magnesium matrix composites (Al_(18)B_4O_(33)w/Mg) were... fracture of the whisker, but reduce the holes in the composite during impregnation and improve the interfacial bonding between the whisker and the matrix alloy. Compared with that of the matrix as-cast......
SiC晶须增韧光敏树脂的力学性能影响因素研究 王彪1,王爱玲1,刘永姜1,朱丽梅1 (1.中北大学,山西省"先进制造技术"重点实验室,山西,太原,030051) 摘要:根据光固化成型技术(SL)工艺对光敏树脂的要求和光敏树脂的固化机理,选择匹配的单体三羟甲基丙烷三丙烯酸酯和光引发剂2-异丙基硫杂蒽酮,通过大量的试验合成光敏树脂.针对研制的光敏树脂力学性能不太理想的问题,利用经表面处理后的SiC晶须对树脂体系进行增韧试验,晶须的表面处理工艺和晶须含量(含量均指质量分数)对光固化复合材料力学性能的影响,晶须含量对光固化复合材料固化速度的影响进行分析.实验结果表明:改性后的光敏树脂力学性能有所提高;随着晶须含量的增加,固化速度明显变慢. 关键词:SiC晶须; 光敏树脂增韧; 力学性能; 影响因素; SiC whisker; photosensitive resins......
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Science and Technology(AIST)摘 要:Spontaneous metal whisker growth phenomenon has been studied for70 years,but still resists interpretations,which has haunted... etc.,which phases out the Pb-addition practice to mitigate Sn whiskers.This paper reviews the origin of the whiskering phenomenon and whisker-induced problems,ranging from early in the World War......
Development of Some Fundamental Research of SiC_W/Al Composites in HIT PartⅠ Microstructure and SiC/Al Interface of SiC_W/Al CompositesLin GENG Congkai YAO Dept.of Metals and Technology,Harbin Institute of Technology (HIT),Harbin,150006,China摘 要:<正> The microstructure of SiC whisker reinforced aluminium alloy (SiCw/Al) composite is reviewed,andthe......
whisker; growth rate; vapor-liquid-solid growth; vapor-solid growth 锌蒸气的氧化动力学研究已经揭示: 在一定的氧化条件下, 锌蒸气中存在凝聚生长的锌液滴与气态锌原子的动态平衡, 由此导致了不同形貌的结晶体[1, 2]. 但是, 要探明四针状氧化锌(T-ZnO)的生长机理, 还需在此基础上作进一步的研究. 目前...; Statistic of diameters and corresponding length from Refs.[3, 4] 图2 晶须生长速度与直径的关系 Fig.2 Relationship between growth rate and whisker radius 2.2 锌液滴在晶须生长过程中的作用 根据热力学计算......
temperature during the heating of cycling. Key words: Mg based composites; Mg2B2O5 whisker; thermal cycling; superplasticity; strain rate 基金项目:国家重点基础研究发展计划资助(2011CB612200)；国家科技部国际科技合作计划项目( 2009DFA51830 ) 收...率敏感指数m越大,超塑性越强.高温蠕变也呈现出超塑性,但应变速率敏感指数低,且应变速率比相同加载热循环的低. 参考文献: [1] CHEN S H, JIN P P, SCHUMACHER G, WANDERKA N. Microstructure and interface characteristics of a cast Mg2B2O5 whisker reinforced AZ91D......
Microstructure and Mechanical Properties of CaCO3 Whisker-reinforced Cement曹明莉School of Civil Engineering,Dalian University of Technology摘 要:Composite... strength limited its use in stress-bearing locations.The aim of this study is to improve the toughness and fracture resistance by incorporating CaCO3 whisker in cement matrix.Effect of different content......
Si-B4C复合抗氧化剂对MgAlON材料高温氧化行为的影响 张静宇1,孙加林1,张厚兴2,张海波4,周宁生5,洪彦若1 (1.北京科技大学材料科学与工程学院;2.清华大学深圳研究生院,深圳,518057;3.清华大学材料科学与工程系;4.焦作工学院资源与材料工程系;5.洛阳耐火材料研究院) 摘要:研究了Si-B4C复合抗氧化剂对MgAlON材料高温氧化行为的影响.通过对氧化后试样脱色层的厚度,相组成,氧化产物中尖晶石相的晶格常数及显微结构的研究发现,该复合抗氧化剂能显著改善MgAlON材料的高温抗氧化性能.抗氧化机理在于:在相对较低的温度(1100℃以下)下,SiO2和B2O3作用形成低粘度,低挥发性,低氧扩散系数的硼硅酸盐玻璃而有效地封闭气孔和裂纹;在较高温度下,硼硅酸盐玻璃中的SiO2和B2O3又能和MgAlON氧化产物中的α-Al2O3作用,形成由莫来石和Al18B4O33......
