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foams by powder metallurgy route 图2 不同Mg含量的泡沫铝宏观照片(发泡温度为1 073 K) Fig.2 Macrographs of Al foams with different mass fractions of Mg at foaming temperature of 1 073 K: (a) Without Mg; (b...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......
Trans. Nonferrous Met. Soc. China 26(2016) 1176-1182 Low frequency damping behavior associated with sintering process in Al powder compact Gang-ling HAO, Xian-yu LI, Wei-guo WANG College of Physics... can be interpreted as the viscous sliding of grain boundaries. The similar phenomena are also found in the Mg green powder compact. Key words: Al powder compact; internal friction; sintering; grain......
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.... Key words: refinement; consolidation; equal channel angular pressing and torsion; Al powder 1 Introduction The mechanical properties of powder materials can be improved qualitatively when......
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料的抗渗能力与堆积密度有关, 捣实状态下的抗渗能力比松散状态的好, 铝液能够使电解质向防渗料的渗透量增加, 在电解质中加入铝块后, 防渗料的抗渗能力减弱. 关键词: 铝电解槽; 干防渗料; 导热性; 抗渗性 中图分类号: TF821 文献标识码: A Thermal conduction and anti-penetration of dry barrier powder..., 816℃体积稳定. 表1 干防渗料的化学成分 Table 1 Chemical compositions of dry barrier powder materials (mass fraction, %) 刨炉材料是在电解槽上使用过1000多天的防渗料. 抗渗实验所用的电解质成分是: 工业用冰晶石和氧化铝, 分析纯氟化钠. 1.2 实验方法......
实验 配料采用99.99%工业纯铝,99.80%电解铜板,99.90%纯Mg,及工业纯Si,在高纯石墨坩埚电阻炉中熔配出Al-Cu,Al-Si中间合金,再加入上述纯金属配出所需成分,3种实验合金成分分别为:合金A,Al-5.17Cu-2.63Si(质量分数,下同)；合金B,Al-4.29Cu- 1.09Mg；合金C,Al-2.09Si-1.66Mg. 为使同成分合金在3种差别较大的冷却速度...文章编号:1004-0609(2012)02-0343-07 热处理对不同冷速Al合金共晶相形貌及含量的影响 赵光伟1,李新中1,徐达鸣1,郭景杰1,傅恒志1,贺跃辉2,杜 勇2 (1. 哈尔滨工业大学 材料科学与工程学院,哈尔滨 150001； 2. 中南大学 粉末冶金国家重点实验室,长沙 410083) 摘 要:选取成分为Al-5.17Cu-2.63Si(合金......
; accepted 13 July 2014 Abstract: 35% SiCp/2024 Al (volume fraction) composite was prepared by powder metallurgy method. The microstructures of SiCp/Al interfaces and precipitate phase/Al interfaces... can be controlled via SiCp oxidation technical parameters. 3) Powder metallurgy method. According to the reactivity between SiC particles and molten Al, powder metallurgy becomes an effective way......
images of Al-MWCNTs composite powders: Fig. 1(a) exhibits powder morphology before planetary milling, Fig. 1(b) shows its magnified image, Fig. 1(c) exhibits powder morphology after planetary milling... of MWCNTs inside soft aluminum powder. Figure 2 shows Raman spectra of initial MWCNTs, powder after milling and composite sheet, respectively. Al-MWCNTs composite sheet and powder exhibit two broad peaks......
pellets and Al(OH)3 powder (Tianjin Kermel Chemical Reagent Ltd., China) were dissolved in deionized water under the heating and stirring condition. And then the obtained solution was filtered twice... angle were measured and calculated. 1) Solid surface free energy As the particle size distribution of the powder may have an impact on the contact angle, the Bayer industrial Al(OH)3 powder was screened......
