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碳化硅颗粒增强铝基复合材料(SiCp/2024Al) 的热变形行为 刘越1,赵明久1,毕敬1 (1.中国科学院金属研究所,沈阳,110016) 摘要:采用Gleeble-1500热模拟实验机对17%SiCp/2024Al(体积分数)复合材料在温度为573-773 K,应变速率为0.02-0.5 s-1变形条件下的热变形行为进行了研究.结果显示,复合材料的流变应力随变形温度的升高,应变速率的降低而降低,采用位错-颗粒交互作用模型能够合理的解释复合材料的应力-应变行为;采用Power-Arrhenius型速率方程ε=Aσ1/mexp(-Q/RT)对复合材料的热变形激活能Q进行了计算,结果显示......
as the matrix alloy. The composite was synthesized through a semi-solid processing route using SiC particles with average sizes of 1, 5, 20 and 50 μm, respectively as reinforcing particles. Silicon carbide is a material of particular interest due to its low density, high melting point and hardness. These properties make silicon carbide an attractive candidate for reinforcement of aluminium alloys when......
and Engineering A, 2014, 597: 359-369. [2] VARIN R A. Intermetallic-reinforced light-metal matrix in-situ composites [J]. Metallurgical and Materials Transactions A, 2002, 33: 193-201. [3] MANDAL A, MAITI R...: 1825-1857. [17] NARDONE V C, PREWO K M. On the strength of discontinuous silicon carbide reinforced aluminum composites [J]. Scripta Materialia, 1986, 20: 43-48. 基于增强相分布均匀性的颗粒增强铝基复合材料的强化机制 陈 刚1,万 佳1,贺 宁1,张鸿名......
fraction, %) Al2ZrO5 nanoparticles were prepared by sol-gel auto-combustion method. Appropriate amounts of analytical grade Zr(NO3 )4·3H2O and Al(NO3)3·9H2O were taken and mixed with glycine. The molar... are different, only Al2ZrO5, silicon (Si) and aluminum (Al) are detected. Also, no undesirable phases in the compositions are found. Fig. 1 XRD pattern of Al2ZrO5 nanoparticles Fig. 2 SEM image......
about the SLM PAMCs are discussed and emphasized. Firstly, the special attention is paid to the metallurgical behavior and synthesis principle of the SLM PAMCs during the SLM process. Afterward, the evolution of metallurgical defects and metallurgical micro- structures of SLM PAMCs are explained and presented to highlight the unique features different from those in the conventionally processed PAMCs......
Trans. Nonferrous Met. Soc. China 22(2012) 2548-2553 Preparation, microstructure and dislocation of solar-grade multicrystalline silicon by directional solidification from metallurgical-grade... 2012 Abstract: A vacuum directional solidification with high temperature gradient was performed to prepare low cost solar-grade multicrystalline silicon (mc-Si) directly from metallurgical-grade mc-Si......
Impurities evaporation from metallurgical-grade silicon in electron beam melting processWANG Qiang, DONG Wei, TAN Yi, JIANG Dachuan, ZHANG Cong, and PENG Xu School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China摘 要:The purification of metallurgical-grade silicon (MG-Si) has been investigated during electron......
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