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was developed, including debinding, high-temperature sintering and copper melting infiltration. The results show that the optimal parameters are 15 W in laser power, 1 000 mm/s in scanning velocity, 0.1 mm...; melting infiltration 钼是一种蕴藏量极少的战略物资,它具有较高的硬度和脆性,机加工困难,特别是加工成形状复杂,精密部件时效率低,废品多.而钼......
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(National Defence Key Discipline Laboratory of Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang 330063, China) Abstract: The vacuum gas pressure infiltration...; vacuum gas pressure infiltration method; microstructure; mechanical property Foundation item: Projects(51765045, 51365043) supported by the National Natural Science Foundation of China; Project......
infiltration and pyrolysis; distribution manner of fiber; property; [全文内容正在添加中] ......
to prepare the 3D-SiC preform firstly, and then the molten Al alloy is infiltrated into thepreform by pressure or pressureless infiltration process [11-14]. For the first step, gelcasting is a promising... the network preform when infiltrated by pressureless infiltration, resulting in preparation defects, and a higher infiltration temperature is needed to ensure the melt fluidity [5]. It is known that the brittle......
/Si-O-C材料; 力学性能; 微观结构; precursor infiltration pyrolysis; polysiloxane; 3D C_f/Si-O-C composites; mechanical properties; microstructure; [全文内容正在添加中] ......
South University, Changsha 410083, China Received 30 May 2010; accepted 5 August 2011 Abstract: C/C composites with banded structure pyrocarbon were fabricated by fast chemical vapor infiltration (CVI... composites show different fracture characteristics at various regions, which leads to good toughness and bending strength. Key words: C/C composites; chemical vapor infiltration (CVI); high density......
物发生了由非晶态向晶态的转变.微观结构分析显示,SiOC泡沫陶瓷呈三维网状结构,微孔分布较均匀. 关键词:泡沫陶瓷; 硅树脂; 先驱体转化法; 造孔剂; PVB; foam ceramic; silicon resin; precursor infiltration pyrolysis; pore-forming agent; PVB; [全文内容正在添加中] ......
; asphalt mixture; infiltration test; modified asphalt SMA(Stone mastic asphaltum)路面从20 世纪60 年代中期开始在德国应用,到了80 年代,SMA 混合料在欧洲许多国家得到了广泛应用[1].自1992 年SMA 首次在我国首都机场高速公路上使用以来,全国各地都建了很多的SMA路面,特别是近年,随着SMA技术的不断成熟.... 基于渗流理论的沥青路面渗入率计算与分析[J]. 中南大学学报: 自然科学版, 2010, 41(2): 742-748.DAN Han-cheng, LI Liang, YANG Xiao-li, et al. Calculation and analysis of infiltration rate of asphalt pavement based on percolation......