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of reinforcements as well as the working condition and rubbing materials [14]. ZHANG et al [2,3] showed that a transition from sliding wear to severe wear occurred with increasing loads. The wear rates of particular materials increase with increasing the sliding speed and then decrease because of either surface oxidation or the effects of work hardening. JIANG et al [15] investigated the effects......
phenomenon and has a significant effect on flow behavior during hot deformation of magnesium alloys. Since ION et al [19] proposed a rotational dynamic recrystallization (RDRX), a kind of continuous... were focused on the effect of deformation temperature during hot deformation. KAIBYSHEV et al [30], for instance, conducted an investigation on low-temperature DRX at ambient temperature for producing......
resistance than the Zn-P coating on the AZ31 magnesium alloy. The formation and corrosion resistance of Zn-Ca-P coating are significantly influenced by its microstructure and the chemical composition of Mg-Al... The experimental material was commercial rolled AZ31 alloy (chemical composition: 3% Al, 1% Zn and balance Mg, mass fraction), which was supplied by Beijing Guangling Jinghua Science & Technology......
]. 矿冶工程, 2002, 22(4): 51-54. SUN Wei, HU Yuehua, QIU Guanzhou, et al. A study on electrochemical corrosion of surface reaction of pyrite in high alkali environment[J]. Mining and Metallurgical..., 2013: 142-148. ZOU Caineng, TAO Shizhen, HOU Lianhua, et al. Unconventional petroleum geology[M]. 2nd ed. Beijing: Geological Publishing House, 2013: 142-148. [2] 邱小松, 胡明毅, 胡忠贵. 中扬子地区下寒武统岩相古地理及页岩气成藏条件分析......
of the Electrochemical Society, 2011, 158(12): 1411-1416. [48] KOMABA S, MATSUURA Y, ISHIKAWA T, YABUUCHI N, MURATA W, KUZE S. Redox reaction of Sn-polyacrylate electrodes in aprotic Na cell[J......
coatings on AZ31 magnesium alloy. LIU et al [16] found that abrasive wear was dominant for Ni-P-WC composite coating due to the existence of embedded WC nanoparticles. Since the nanoparticles are dispersed... magnesium alloy serving as a protective layer that inhibits corrosion reaction. Fig. 8 Polarization curves of substrate, Ni-P coatings and Ni-P-TiN composite coatings in neutral 3.5% NaCl at room......
达克质岩石具有高Cr,Ni含量和高Mg指数的特点[37].而花岗闪长斑岩的Cr,Ni含量以及Mg指数相对较低,这排除了拆沉下地壳的成因模式.而岩浆混合作用则缺乏岩相学及地球化学的证据.除此以外,交代岩石圈地幔直接部分熔融也是形成埃达克质岩石[38],其往往表现出极高的钾含量,属橄榄玄粗岩系列.浸铜湖的花岗闪长斑岩均属高钾钙碱性系列岩(见图4(c)),这与此种成因模式也不相符. 图7  ..., 5-6, 8, 22],这一模式能很好地解释华夏地块内陆发育多阶段的玄武质岩浆活动以及内陆及沿海地区差异化分布的A型花岗岩. 图9 浸铜湖侵入岩的Ba-Ni图解和Sr-Eu/Eu*图解(分配系数引自网站http://earthref.org/cgi-bin/er.cgi) Fig. 9 Ba-Ni (a) and Sr-Eu/Eu* (b) diagram......
铷的熔点很低,能与之形成二元合金的金属并不多.铷在液态铝中的溶解度低于0.05%(摩尔分数),反过来铝在铷中的溶解度也非常小,没有Rb-Al二元合金[4].另外,铷与Ag不混熔[5],与Ca,Sr完全不共熔[3, 6],与Cu,Nb,V不能形成合金[7-8].表2所列为文献报道的可与铷形成二元合金或化合物的元素及其二元合金与化合物的晶体参数[9-12]. 1.3 铷化合物的基本结构与... J, PELTON A D. The Al-Rb (aluminum-rubidium) system[J]. Journal of Phase Equilibria, 1993, 14(3): 367. [5] PELTON A D. The Ag-Rb (silver-rubidium) system[J]. Bull Alloy Phase Diagrams, 1986, 7(1): 19......
corrosion resistance although they have many attractive properties such as high strength, low density (approximately 35% and 65% smaller than that of Al-based and Ti-based alloys respectively), high... and corrosion protective sol-gel film on the magnesium alloys is not possible mainly due to reaction between the active magnesium substrate and the acidic sol solution which leads to the formation of loose sol......
aluminum hydrate ores which are gibbsite Al(OH)3, boehmite γ-AlOOH and diaspore α-AlOOH. It is accumulated with a number of impurities, such as the two iron oxides (goethite and hematite), the clay...], MALITO and ROBERSON [5], SCHEPERS et al [6] and et al [7-10] proposed that organic compounds dissolved in the Bayer process resulted in poorer settling performance of red mud. et al [7-10......