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]. Electroless plating can only achieve a relatively uniform metallic layer effectively, while sol-gel method is an advanced technique to synthesize high quality ceramic materials including fine powders..., the sol-gel method has the disadvantages of complicated technology, high cost and severe pollution. The precipitation process is very effective for the preparation of whisker coating and it has......
results in high concentration of Mg ion and hydrogen gas release, and subcutaneous emphysema[3]. In addition, the yield strength of pure magnesium is only about 20 MPa, much lower than that of human long...], and element alloying and structure control, such as high purification treatment[10], heat-treatment and rapid solidification[11-12]. Element alloying can not only improve the corrosion resistance but also......
. However, their extreme susceptibility to corrosion in comparison with other metals has greatly limited further utilization. Previous studies[1-4] showed that for magnesium alloys, rare earth(RE... in corrosion film is the highest among the four alloys. Moreover, oxygen concentration is quite high at the first stage of sputtering and then dramatically decreases with further sputtering. So, the oxygen......
important for resistance to heavy metals. SODs can be divided into four distinct classes, Cu/Zn, Fe, Mn and Ni according to their active prosthetic group contained[7]. Among them, Fe SODs...-negative and chemolithotrophic bacterium, is one of the most extensively studied bacteria in bioleaching and acidic mine drainage, which are extremely acidic and contain a large range of high concentration......
by low cost for recovering metals from low-grade refractory ores and has received growing attentions due to the increasingly stringent environmental protection regulations[1-3]. Therefore, it is an economical method to recover metals from minerals, especially low-grade ores, overburden, and waste from current mining operations which require moderate capital investment and operating cost[4......
; 1 Introduction It was observed that the additions of small quantities of reactive elements such as rare earth elements(REs), Ti, Zr and Hf into high... with a dose of 1×1017 Ce+/cm2 using the metal vapor vacuum arc (MEVVA) equipment with high-current metal-ion source. During the implantation, a voltage of 50 kV and a beam current of 2.3 mA were used......
on microstructure and mechanical properties of high-zinc super-high strength aluminum alloy[J]. The Chinese Journal of Nonferrous Metals, 2005, 15(1): 116-122. [2] 杨守杰, 谢优华, 陆 政, 苏 彬, 戴圣龙, 颜鸣皋. Zr 对超高强铝合金时效... retrogression and reaging heat treatment of super-high strength Al-Zn-Mg-Cu -Zr alloy containing Sc LI Wen-bin1, 2, PAN Qing-lin1, LIU Jun-sheng1, LIU Xiao-yan1, GUO Yun-shu1, ZHANG Xin-ming1 (1......
diagram at high temperature 由Mo2FeB2的液相烧结机理可知[13-16],在1 092 ℃,γ-Fe和Fe2B生成液相L1,液相的生成则极大地提高了烧结体的致密度.而液相对Mo2FeB2的润湿性的好坏是液相烧结的重要条件.温度和时间对润湿性有较大影响,由于Fe对Mo2FeB2的润湿为非反应性润湿,所以润湿在很短时间内完成.因此,温度对润湿性的好坏有很大影响.由表...,增大了裂纹扩展阻力,这使断裂发生时要经过更多的路程消耗更多的能量,使抗弯强度得到提高. 3) 研究了Mn对粘接相的影响,Mn的存在提高了液相对硬质相的润湿性使组织更加致密,提高了金属陶瓷的硬度和抗弯强度. REFERENCES [1] TAKAGI K. Development and application of high strength ternary boride base......
of Nonferrous Metals, 2005, 15(5): 782-786. [5] WANG Xin, TANG Dian, ZHOU Jing-nen. Microstructure, morphology and electrochemical property of RuO270-SnO230mol% and RuO230-SnO270mol% coatings[J]. Journal... based RuO2-CeO2-SnO2 coating anodes[J]. The Chinese Journal of Nonferrous Metals, 2003, 13(6): 1550-1554. [7] 林 萱, 唐 电. 双层结构钛阳极含铱涂层研究[J]. 材料开发与应用, 1990, 8(4): 21-25.LIN Xuan, TANG Dian. Study on double......
deposited on WC-6%Co[J]. The Chinese Journal of Nonferrous Metals, 2004, 14(3): 429-434. [16] 魏秋平, 余志明, 马 莉, 杨 莉, 刘王平, 肖 和. 化学脱钴对硬质合金沉积金刚石薄膜的影响[J]. 中国有色金属学报, 2008, 18(6): 1070-1081.WEI Qiu-ping, YU Zhi-ming, MA Li, YANG Li, LIU Wang-ping, XIAO He. Effects of chemical surface pretreatments on diamond coatings on cemented tungsten carbide substrate[J]. The Chinese Journal of Nonferrous Metals, 2008......