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能及摩擦磨损性能的Ni-Al-石墨高温固体自润滑材料. 1 实验 1.1 原料 采用纯度为99.8%的电解镍, 纯度为96.4%的工业纯铝和纯度为99%的石墨粉. 按质量分数配比合金, 合金成分如表1所列. 表1 Ni-Al-C合金的成分 Table 1 Chemical composition of Ni-Al-C alloys(mass...文章编号: 1004-0609(2006)06-1006-06 Al含量对Ni-Al-C合金凝固组织和性能的影响 陈金栌, 朱定一, 林登宜 (福州大学 材料科学与工程学院, 福州 350002) 摘 要: 研究了Al含量对Ni-Al-C系自润滑材料凝固组织的影响, 测试了合金的力学性能和摩擦磨损性能. 结果表明: 当Al含量为4.25%时, 凝固组织中的石墨含量较高, 且......
文章编号:1004-0609(2011)11-2909-07 V型铝槽内腔微弧氧化的不均匀性 马英鹤, 巩春志, 田修波, 杨士勤 (哈尔滨工业大学 先进焊接与连接国家重点实验室,哈尔滨 150001) 摘 要:采用恒压模式于硅酸盐体系中在V型内腔试件表面制备微弧氧化膜,研究V型角度对微弧氧化膜不均匀性的影响.采用数字式测厚仪,扫描电子显微镜和X射线衍射仪研究其微观结构,利用电化学分...化处理时间后,试件内表面不均匀程度增大. 关键词:纯铝;V型槽;微弧氧化;不均匀性 中图分类号:TG174 文献标志码:A Inhomogeneity of micro-arc oxidation of V-shaped aluminum cavity MA Ying-he, GONG Chun-zhi, TIAN Xiu-bo, YANG......
wires of Al-0.16Zr, Al-0.16Sc, Al-0.12Sc-0.04Zr (mass fraction, %) and pure Al (99.996%) were produced with the diameter of 9.5 mm by continuous rheo-extrusion technology, and the extruded materials were heat treated and analyzed. The results show that the separate additions of 0.16% Sc and 0.16% Zr to pure Al improve the ultimate tensile strength but reduce the electrical conductivity......
Trans. Nonferrous Met. Soc. China 28(2018) 1-8 Effect of strain rate on microstructural evolution and thermal stability of 1050 commercial pure aluminum Yang YANG1,2,3, Jun-liang WANG1, Ya-dong CHEN1... Abstract: Effects of strain rate on the microstructure evolution and thermal stability of 1050 commercial pure aluminum processed by means of split Hopkinson pressure bar (SHPB) and Instron-3369......
低,泡沫体中无泡层的厚度得到很好的控制. 关键词:泡沫铝;熔体发泡法;无泡层;黏度;表面张力 中图分类号:TG 146.2 文献标识码:A Formation and control of bubble-free layer during preparation of Al foam by foaming in melt...气泡,随着发泡的进行,球形气泡逐渐长大,长大到一定尺寸以后,球形气泡转变为多边形气泡(见图2(d)),多边形气泡随着发泡时间的延长还可进一步长大(见图2(e)).在泡沫体长大和气泡变化的过程中,泡沫体底部的无泡层随着发泡时间的延长而发生变化. 图2 不同发泡时间制取的泡沫铝样品 Fig.2 Al foams produced by different foaming......
Trans. Nonferrous Met. Soc. China 24(2014) 1289-1294 Refinement and consolidation of pure Al particles by equal channel angular pressing and torsion Ping LI, Ke-min XUE, Xiao-xi WANG, Chen-hao QIAN School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China Received 8 May 2013; accepted 3 September 2013 Abstract: Consolidation of pure Al powder was conducted......
magnetic field to 2124 Al alloy melt and found an evident modification occurring in the solidification structures. GAO et al [8] studied the structural transformation in pure Al under external PMF...-melting pure Al and high-melting stainless steel under external pulsed magnetic field [J]. Materials Letters, 2007, 61: 4011-4015. [9] WANG Bin, YANG Yuan-sheng, SUN Ming-li. Microstructure refinement......
硫酸锌溶液与改性铝基吸附剂之间的平衡分配,吸附过程为优势吸附. 参考文献: [1] YANG Kai, LI Yifan, ZHAO Zejun, et al. Amorphous porous layered-Al2O3 derived from AlFu MOFs as an adsorbent for removing fluorine ions in industrial ZnSO4...(1) (2) 式中:A为氟离子脱除率,%;0为工业硫酸锌溶液中初始氟离子质量浓度,mg/L;e为吸附平衡时工业硫酸锌溶液中氟离子质量浓度,mg/L;qe为吸附平衡时吸附剂的吸附容量,mg/g;V为溶液体积,L;m为吸附剂的质量,g. 2 改性铝基吸附剂的特性 2.1 物相分析 实验制备所得硫酸镁改性铝基吸附剂的主要物相如图1所示.从图1可见:吸附剂主要由Al(OH......
Mg粉添加量对泡沫铝发泡行为及泡沫稳定性的影响进行研究.结果表明:Mg粉的添加导致前驱体膨胀率的显著增大和泡沫体泡孔结构的均匀化;添加的Mg粉同空气雾化Al粉表面的Al2O3反应,生成同铝熔体有良好润湿性的MgAl2O4相,打破原有铝粉表面的氧化物结构,生成的MgAl2O4相均匀地分布于泡孔的布拉德边界和泡壁上;润湿性MgAl2O4相的出现增加熔体的表观黏度,大大减弱重力排液,毛细作用和气泡流动带来的负面影响,从而提高泡沫的稳定性;在空气雾化工业纯Al粉含氧量(质量分数)为(0.34±0.01)%和Mg粉添加量为(0.6%~1.0)%的条件下,可以获得最佳的膨胀率和均匀的泡孔结构. 关键词:泡沫铝;粉末冶金;Mg粉;发泡行为;泡沫稳定性 中图分类号:TG 146.21 文献标志码:A Effect of addition of Mg......
, the deformation and damage features as well as microstructures of ECAP-treated pure Al at different temperatures T and strain rates were systematically studied through compression tests... to the increases both in yield strength and flow stress at high temperatures. Key words: equal channel angular pressing (ECAP); pure Al; strain rate; high temperature compression; deformation; damage......