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Trans. Nonferrous Met. Soc. China 26(2016) 2910-2915 Synthesis of nickel aluminate nanoceramic compound from aluminum and nickel carbonate by mechanical alloying with subsequent annealing M... work was to produce pure nickel aluminate (NiAl2O4) nanoceramic compound by high energy milling of nickel carbonate (NiCO3) and aluminum (Al) powders followed by annealing. Phase composition, thermal......
), potassium cryolite (K2AlF5), aluminum fluoride (AlF3), and fluorosilicates (Na2SiF6 or KNaSiF6). Furthermore, the effects of the ore/HF ratio and leaching temperature on the leaching behavior of Li... The leaching experiments were performed in a closed Teflon crucible, equipped with a magnetic stirring device and heated by an oil bath. About 10 g of the ore sample was first added into the crucible......
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Bi2O3涂覆Al18B4O33晶须增强铝基复合材料的阻尼性能刘刚1,孙雅丽2,胡津1,周科2(1.黑龙江省哈尔滨市哈尔滨工业大学材料科学与工程学院2.烟台工程职业技术学院 机制工艺系)摘 要:采用挤压铸造方法制备了Bi2O3涂覆Al18B4O33晶须增强的铝基复合材料.探讨了Bi2O3含量,应变振幅,温度以及频率对涂覆复合材料阻尼性能的影响.并对涂覆后复合材料的阻尼机制作了初步的探讨.研究发现,涂覆复合材料在80和285℃附近存在2个明显的阻尼峰.涂覆复合材料的阻尼性能不仅强烈依赖于晶须表面涂覆物的含量,而且......
包Al层聚集对搅拌摩擦焊接头力学性能的影响康旭1,史清宇1,孙凯1,王鑫2(1.北京市清华大学机械工程系先进成形制造教育部重点实验室2.清华大学 核能与新能源技术研究院)摘 要:通过拉伸以及三点弯曲实验,研究了底部包Al层聚集现象对搅拌摩擦焊接头力学性能的影响.利用OM,SEM和EDS分析了底部包Al层聚集现象降低接头力学性能的原因.实验结果表明:焊接前未去除包Al层的试样,其抗拉和抗弯强度要比焊前或者焊后去除包Al层的试样低.焊接过程中,焊缝底部平铺的包Al层在搅拌头的作用下,被流动的金属材料挤到了洋葱环的两......
文献标识码:A FEM simulation for forming process of cold press forging of 1100-H14 aluminum alloy sheets WANG Ke-sheng1, 2, LIU Quan-kun2, ZHANG De-yuan2 (1. School..., but also local structures like embossment can be formed simultaneously. In order to shape a heat sink base with embossment, the forming process of cold press forging of 1100-H14 aluminum alloy sheet......
, Harbin 150040, China; 2. Mudanjiang Foton Automobile Air Conditioner Co. Ltd, Mudanjiang 157003, China) Abstract: The air-conditioner swaying tray of automobile made of 4A11 aluminum alloy.... Technological study of liquid die forging for the aluminum alloy connecting rod of an air compressor[J]. Journal of Materials Processing Technology, 2003, 139: 462-464. [6]Cabibbo M, Evangelista E......
of Materials Science and Engineering, Central South University, Changsha 410083, China) Abstract: The precipitation behavior of AA3003 aluminum alloy during annealing as well as its effect... of structure on mechanical behavior and stretch formability of constitution ally dynamic 3000 series aluminum alloys[J]. Mater Sci Eng A, 1986, A77(1-2): 59-74. [4]Humphreys F J. Nucleation......
, in the medium of water, the reaction occurs quickly with the products of aluminum trihydroxide, calcium carbonate and water. And the reaction rate increases with the increase of the reaction temperature... chemistry principle about comprehensive basic process for mineral containing aluminum[M]. Changsha: Central South University of Technology Press, 1988: 32-36. [3] Xu B A, Giles D E, Ritchie I M......
, respectively from HV0.03 88.57. In the Mg-6Al alloy the content of aluminum is increased, while in the Mg-6RE alloy the content of oxygen is decreased. It can be concluded that it is beneficial... are listed in Tables 1-4. Table 1 Chemical composition of magnesium(mass fraction, %) Table 2 Chemical composition of aluminum (mass fraction, %) Table 3 Chemical composition of RE (mass......