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Trans. Nonferrous Met. Soc. China 25(2015) 46-53 Effect of iron addition on microstructure, mechanical and magnetic properties of Al-matrix composite produced by powder metallurgy route A. FATHY1... of the diamagnetic Al13Fe4 intermetallic compound in the higher Fe content sample detected by XRD analysis. Key words: Al-Fe composite; powder metallurgy; microstructure; mechanical properties; magnetic......
J. Cent. South Univ. (2021) 28: 1195-1205 DOI: https://doi.org/10.1007/s11771-021-4669-y Microstructural evolution and mechanical properties of an ultrahigh-strength Al-Zn-Mg-Cu alloy via powder... of the Al-10Zn-3.5Mg-1.5Cu alloy after hot extrusion and subsequent heat treatment achieve 810 MPa, 770 MPa and 8%, respectively. Key words: powder metallurgy; Al-Zn-Mg-Cu alloy; ultrahigh strength; hot extrusion Cite......
stress condition, Eq.(3). KIM et al[2] mentioned that Eq.(3) is mandatory for porous materials, but not for powder. The foctor η was introduced via the flow stress in order to characterize geometrical... A, 2001, 307(1/2): 67-73. [3] ROSSI R, ALVES M K, AL-QURESHI H A. A model for the simulation of powder compaction processes [J]. Journal of Materials Processing Technology, 2007, 182(1/2/3): 286-296. [4......
DOI:10.19476/j.ysxb.1004.0609.2018.11.20 铝灰中活性物相的反应行为 刘桂华1,黄文强1,熊德芬2,王洪阳1,李小斌1,周秋生1,彭志宏1,齐天贵1 (1. 中南大学 冶金与环境学院,长沙 410083； 2. 云南文山铝业有限公司,文山 663099) 摘 要:采用XRD和SEM-EDS (微区分析)研究了铝灰的工艺矿物学以及其活性物相Al和AlN在水和氢氧化钠溶液中的反应行为.结果表明:铝灰中活性物相Al,AlN等含量较多,且AlN含量多于Al的.铝灰中Al多以球形颗粒单独存在,也常与Si嵌布形成合金；AlN以大颗粒块状或针状颗粒单独存在,也可与α-Al2O3共存；刚玉(α-Al2O3)存在的形态不一；NaCl大多单独聚集存在,少部分被包裹和分散.活性含铝物相Al和AlN在与水反应时,反应缓慢,反应率小；AlN比Al更易反应；Al与水......
分如表1所列.利用激光粒度测试仪测算出其初始粒度为46.8 ?m.挤压毛坯制备过程如下:将粉末压坯,进行冷等静压处理,再在400 ℃真空条件下烧结,时间为4 h,最后通过线切割加工成d 7 mm×45mm的圆柱形试样以备用. 表1 纯铝粉末的主要化学成分 Table 1 Main chemical compositions of pure Al powder (mass...次的增加,硬度增加趋于缓慢. 关键词:粉末烧结材料；组织；性能；包套-等通道转角挤压 中图分类号:TG 376 文献标识码:A Equal channel angular pressing of pure Al powder sintered material LI Ping, HUANG Ke-shuai, XUE Ke-min......
: Chongqing University Press, 1989. [15] 张国范, 陈启元, 冯其明, 等. 温度对油酸钠在一水硬铝石矿物表面吸附的影响[J]. 中国有色金属学报, 2004, 14(6): 1042-1046. ZHANG Guo-fan, CHEN Qi-yuan, FENG Qi-ming, et al. Influence of temperature...:TD913 文献标识码:A 文章编号:1672-7207(2007)02-0285-06 Separation of clinochlore from powder quartz by reverse......
reached 403 W/(m·K) [7,19,20]. HANADA et al [21] reported the processing of diamond/Al with mean particle size of 5 nm by powder metallurgy method. The addition of 1% (volume fraction) cluster diamond...Trans. Nonferrous Met. Soc. China 23(2013) 3584-3591 Effect of heat treatment on microstructure and thermophysical properties of diamond/2024 Al composites Zi-yang XIU1, Xu WANG2, M. HUSSAIN3, Chao......
文章编号:1004-0609(2011)05-1060-06 磷酸盐连接NiFe2O4基金属陶瓷的界面形貌和连接机理 李 超, 张 雷, 周科朝, 李志友, 陈 孜 (中南大学 粉末冶金国家重点实验室,长沙 410083) 摘 要:针对铝电解用金属陶瓷惰性阳极材料与金属导杆的电连接困难问题,以Al(H2PO4)3为胶粘剂,CuO为固化剂,NiFe2O4陶瓷粉和Cu-Ag合金粉..., NiFe2O4 ceramic powder and Cu-Ag alloy powder as filler. The reaction process of Al(H2PO4)3 and CuO was analyzed. The microstructures of bonding interface were investigated. The bonding mechanism......
CaCO3在铝酸钠溶液中的反苛化作用 李小斌,郑洁,齐天贵,王丹琴,张海宝 (中南大学 冶金与环境学院,湖南 长沙,410083) 摘要:在热力学计算的基础上,研究CaCO3在铝酸钠溶液体系中发生反苛化反应的规律.热力学计算表明,低温条件下,CaCO3与游离苛性碱形成Ca(OH)2的反苛化程度较小,而其与Al(OH)4-形成3CaO·Al2O3·6H2O(C3AH6)的反苛化反应显著.CaCO3在纯NaOH溶液中反苛化反应的反应率小于5%,而在铝酸钠溶液中其反苛化率可达50%以上,说明Al(OH)4-对CaCO3的反苛化具有显著的促进作用；CaCO3的反苛化率随温度的升高而升高,随铝酸钠溶液苛性比αk的升高呈先升高后降低的规律,当αk为3时,出现极大值；常压条件下,CaCO3在铝酸钠溶液中发生反苛化反应形成C3AH6,而造成氧化铝损失. 关键词:碳酸钙；反苛化；铝酸根离子(Al(OH)4......
channels, was observed. In fact, the size of Al and CaCO3 powder caused the individual pores to join and form some channels between the cells, which are indicated by arrows (Figs. 5(c) and (d)). However... I. Synthesis and characterization of Al foams produced by powder metallurgy route using dolomite and titanium hydride as a foaming agents [J]. Materials and Technology, 2014, 48: 943-947. [17] FENG Y......
