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and composition distribution of as-cast and homogenized 2099 aluminum– lithium(Al–Li) alloy were studied by optical microscopy(OM), differential thermal analysis(DTA), scanning electron microscopy(SEM), energy... homogenization process of the 2099 Al–Li alloy is developed(515 °C 9 18 h ? 525 °C 9 16 h), which shows a good agreement with the homogenization kinetic analysis results.关键词:......
: LiAl, Li3Al2和Li9Al4. 因此, 铝也是有希望作为锂离子电池负极材料的, 而且其嵌锂容量也是比较高的, 最高可以达到平均1mol的Al容纳2.25mol的Li. 虽然铝没有锡那样高的嵌锂容量, 但是考虑到铝的相对原子质量(26.98)远远小于锡的相对原子质量(118.69), 所以铝负极的理论质量比容量(2234mA·h/g)是远远超过锡负极的. 即使当锂嵌入铝负极形成LiAl相时, 铝...电压-比容量曲线图, 由此进一步确认了锂在嵌入AlSb的结构时, 首先是占据AlSb中的间隙位置, 然后随着Li嵌入量的增加, 可以逐步取代AlSb中的Al位置从而形成Li3Sb相. 通过分析Li嵌入AlSb前后的能带结构及态密度图可以发现, AlSb的导电性能首先随Li嵌入量的增加而增加, 当Li占据AlSb全部间隙位置后达到峰值, 当Li进一步替代Al时导电性能随之降低. 关键词: AlSb......
Trans. Nonferrous Met. Soc. China 29(2019) 1793-1802 Through-thickness inhomogeneity of precipitate distribution and pitting corrosion behavior of Al-Li alloy thick plate Kuo ZHAO, Jian-hua LIU, Mei... of precipitate distribution and pitting corrosion behavior of 95 mm-thick 2297 Al-Li alloy rolled plate was investigated using scanning electron microscopy, transmission electron microscopy......
加工, 2002, 25(2): 51-53. XIANG Shu-guang, JIANG Na, WANG Bin, et al. The heat-treatment and properties for 2195 Al-Li alloy[J]. Aluminium Processing, 2002, 25(2): 51-53. [2]熊焕. 低温贮箱及铝-锂合金的应用[J]. 导弹与航天运载技术, 2001(6): 33-41. XIONG Huan.Cryogenic tank and application of Al-Li alloy[J]. Missiles and Space Vehicles, 2001(6): 33-41. [3]刘雪峰, 汪凌云.铝-锂合金高温变形流变应力的人工神经网络模型[J]. 重庆大学学报(自然科学版), 2001, 24(2......
形为拉伸预变形,通过拉伸试验机,采用引伸计进行预变形量的控制. 表1 2195铝锂合金化学成分 Table 1 Chemical composition of 2195 Al-Li alloy (mass fraction, %) 重固溶-T8再时效2195铝锂合金的室温拉伸性能采用MTS 810材料试验机进行测试,拉伸速度为2 mm/min.拉伸测试样品平行段宽度... of 2195 Al-Li alloy as function of T8 re-aging time at different temperatures 2.2 显微组织 图2所示分别为原始2195-T8铝锂合金及重固溶处理后纵截面的金相照片,二者纵截面均表现为明显拉长的带状晶粒组织,且重固溶处理后晶粒长大程度很小.由于2195铝锂合金时效温度(152 ℃)远低于其固溶温度(505~510......
strength and electrical conductivity reach 160 MPa and 64.03% (IACS), respectively. Key words: alloy composition; Al wires; mechanical properties; electrical conductivity; continuous rheo-extrusion 1.... The overhead conductive wires are mainly produced by Al alloy, while it is rather difficult to increase both the electrical conductivity and mechanical properties in the mean time. Therefore, much......
文章编号:1004-0609(2009)12-2119-09 铝锂合金新型立方相的析出规律及机理 王东林,李世晨,王小宁,郑子樵 (中南大学,材料科学与工程学院 长沙 410083) 摘 要:对一种含少量Mg,Zn的Al-Cu-Li合金经过T6(固溶+人工时效)和T8(固溶+预变形+人工时效)热处理后的显微组织进行研究.结果表明:该合金在(T6, 170 ℃)峰时效时析出大量...是21世纪航空航天工业最理想的轻质高强结构材料之一.其中,Al-Cu-Li系合金是目前铝锂合金研究的重点.到目前为止,在该系合金中见诸报道的析出强化相有:球状δ相(Al3Li),片状T1相(Al2CuLi,惯习面为{111}α),片状θ相(Al2Cu,惯习面为{100}α)和少量针状S相(Al2CuMg)及其亚稳相,其析出特性,分布形态,晶体学特征都已被广泛研 究[1-3......
. Structure and properties during aging of an ultra-high strength Al-Cu-Li-Ag-Mg alloy[J]. Scripta Metallurgica, 1990, 24(1): 79-84. [2] 魏修宇, 郑子樵, 潘峥嵘, 陈圆圆, 李世晨, 陈秋妮. 预变形对2197铝锂合金显微组织和力学性能的影响[J]. 稀有金属...低能形核位置[11-12].传统T8工艺的预变形量较低,一般不超过7%.随着预变形量的增加,强化相增多带来合金强度提高的同时将导致塑性的恶化.因此,开发一种既能提高合金强度又不损害塑性并能在一定程度上改善合金其他性能如耐腐蚀性的新型形变热处理工艺对挖掘Al-Cu-Li系合金潜力,扩大其在航天航空领域的应用有着重要的意义.本文作者通过对2A97铝锂合金进行新型的形变热处理研究,以期合金获得理想的强度......
melting process parameters of electron beam cold hearth on the Al element evaporation in TC4 alloy was studied. The results show that when the raw material is the VAR ingot, the secondary ingot is got... components of TC4 alloy. When the raw material is the simple substance Al, the element evaporation loss increases in the melting stage, and it increases with the Al content increasing. Research......
. 2 Experimental The starting materials used in this study are: pure Mg (99.9wt%), pure Li (99.9wt%), pure Al (99.9wt%), and a Mg–10Si master alloy (Mg 90wt%, Si 10wt%). The starting materials..., MAHMUDI R. Compressive and impression creep behavior of a cast Mg–Al–Zn–Si alloy [J]. Materials Chemistry and Physics, 2013, 139(1): 79-86. [16] LIU T, WU S D, LI S X, LI P J. Microstructure evolution......