共搜索到88098条信息,每页显示10条信息,共8810页。用时:0小时0分0秒531毫秒
matrix. During the heating process, an oxide layer is produced on the surface of the titanium plates. However, the oxide layer is completely broken with a large rolling reduction, and then, aluminum... a strong metallurgical bond. Key words: Ti/Al clad plate; rolling; coordination deformation; shear strength; oxide layer Foundation item: Project(51474190) supported by the National Natural Science......
: aluminium-lithium alloy; plasma electrolytic oxidation; corrosion resistance 2A97铝锂合金是我国自主研发的Al-Cu-Li系铝合金,具有低密度,高比模量,高比强度和高比刚度等良好的综合性能,与一般铝合金相比,采用铝锂合金可使构件质量减轻10%~15%,刚度提高15%~20%[1],因此,在航空航天等领域具有广阔的应用前景.但由于锂...6 不同处理时间的铝锂合金PEO膜层微观形貌 Fig. 6 Surface morphologies of 2A97 aluminium-lithium alloy PEO coatings with different treatment times 图6所示为不同处理时间的铝锂合金PEO膜层的表面形貌.从图6(a)可知,处理1 min的膜层表面微孔较少,但从微观上看,表......
annealing procedures, which negates the low temperature advantage of electrodeposition. Atomic layer epitaxy(ALE) can form thin film by using surface limited reactions. Electrochemical atomic layer...Article ID: 1003-6326(2005)02-0404-06 Growth of bismuth telluride thin film on Pt by electrochemical atomic layer epitaxy ZHU Wen(朱 文), YANG Jun-you(杨君友), GAO Xian-hui(郜鲜辉), HOU Jie(侯 杰......
化效果,进而对从NaCl和LiCl混合盐中提取锂进行研究,然后研究MgCl2和LiCl混合盐活化金属Al及水体分解Mg和Li,考察机械活化及活化铝水解反应条件对镁锂分离的影响.结果表明:含有LiCl的盐能使金属铝完全能被活化,经活化后铝快速与水反应生成活性氢氧化铝,同时吸附其中的锂.通过控制合适的机械活化和水浸出条件,活性铝水解吸附法能有效从混合盐中提取锂,锂的吸附率能达到96%.当在镁锂质量比为... rate of Li 上述研究结果表明,通过含锂的氯化盐直接机械活化铝再通过水浸出能有效吸附混合盐中的锂. 2.3 混合盐直接活化铝进行镁锂分离 2.3.1 活化时间对镁锂分离的影响 将金属铝粉加入到镁,锂质量比为20的NaCl,LiCl和MgCl2的混合盐中(具体组成为6%Al- 67%NaCl-2%LiCl-25%MgCl2, 质量分数)进行机械活化不同时间后,然后采用......
. And the morphology of Al2O3 has a significant role on the oxidation kinetics, oxide film evolution and oxidation mechanism. Key words: nickel-based single alloy; oxidation; surface signature; oxide film; kinetics... on the surface after ground to 1000# and polished. And the oxide film structure, from the top surface to the base metal, is NixCo1-xO, Cr-Co-rich, Ta-Cr-rich, Al2O3 and γ′-free zone. However, the oxide films......
Microstructures of surface modification layer on Q235 steelproduced by laser melt injection of WC LI Fu-quan(李福泉), CHEN Yan-bin(陈彦宾), LI Li-qun(李俐群) State Key Laboratory of Advanced Welding... concentrated on the high specific strength materials such as titanium alloy and aluminium alloy[14-15]. Few works chose steel as substrate to produce surface modification layer for improving the mechanical......
of the surface film and enhances the protective capability of the films. Key words: magnesium alloy; SO2; melt protection; surface film 1 Introduction Magnesium and its alloys are being widely used... that the surface film formed in protective atmosphere containing SF6 was a mixture of MgO and MgF2 phases and the film thickness varied between 1 and 2 um. PETTERSEN et al[8] analyzed the microstructure......
of cerium. The structure and chemical compositions of the surface oxide film were investigated by XRD and Auger electron spectrometry(AES). The results of XRD indicate that the oxide film of the surface... excellent ignition-inhibition effect. AES depth profile analysis shows that the oxide film can be divided into three layers. The outside layer is mainly made up of magnesia, the middle layer, which......
......
and outward migration of metal cation species. The barrier layer of anodic oxide film on titanium alloy Ti-10V-2Fe-3Al is also formed by the inward migration of oxygen anions and the outward of migration... of the anodic oxide film obtained by AES, the surface layer after sputtering still contains a small amount of carbon (3%-5%), which shows the thickness of the carbon incorporated layer. Under......