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suitable for X-ray powder diffraction(XRD). The alloy base is substituted by α(Al), due to its little alloying element. 2.2 Potentiodynamic scanning curves of S, β and α(Al) Specimens for electrochemical... through rolling The sectional surface of the simulated alloys was ground using abrasive papers until the tiny S and β phases embedded in the α(Al) can be observed, polished with Cr2O3 powder, degreased......
dispersedly almost in the whole 2014 Al matrix alloy except a slight segregation is observed. Figure 3 shows the result of element area scanning of the TiB2/2014 composite with CeO2. As shown in Fig. 3... matrix composite. So, the TiB2/2014 composite with good particle dispersion is prepared success fully when CeO2 additive is added. Fig. 3 SEM image (a) and elemental mapping of Al (b), Ti (c), Ce (d......
L, NAGY S, KRIZIK P. To what extent does friction-stir welding deteriorate the properties of powder metallurgy Al? [J]. Journal of Materials Research and Technology, 2020, 9(3): 6733-6744. DOI... 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......
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......
超微细改性Al(OH)3填充LDPE/EVA的研究 刘冠文1,谢春灼1,马玫1 (1.广州合成材料研究院,广州,510665) 摘要:Al(OH)3是LDPE/EVA主要的阻燃,消烟填充剂.研究了不同粒度,表面处理及填充量的Al(OH)3对LDPE/EVA的氧指数(OI),烟密度等级(SDR)和物理机械性能的影响. 关键词:Al(OH)3 LDPE/EVA 阻燃 消烟 拉伸强度; [全文内容正在添加中] ......
,因此在这里研究了Al基和Al-6Si基CCAF的吸能情况.泡沫铝单位体积能量吸收能力的计算公式为[13] 式中 W为单位体积能量吸收能力;σ为应变为ε时的应力. 图3所示为依据式(1)绘制的Al基和Al-6Si基CCAF的能量吸收能力.由图3可看出,CCAF的能量吸收能力随着应变的增加而增大;当应变相同时,不同相对密度CCAF能量吸收能力差别较大,相对密度越大,能量吸收能力也就...位体积吸收能量的关系曲线呈现出变化的不规则.无论是Al基还是Al-6Si基的CCAF,随着相对密度的减小,能量吸收的肩都向左下方移动,这意味着相对密度越小的CCAF可以提供更小的最大容许应力σp,能满足承受外界应力临界值更小的被保护对象的要求.但相对密度太小,从图3中可以看到对应的能量吸收能力也相应减小,要吸收较多的能量,只能通过增加吸能空间即增加泡沫铝体积来实现.  ......
耐高温的SiC(Al)纤维 余煜玺1,李效东1,曹峰1 (1.国防科技大学,陶瓷纤维及其复合材料重点实验室,长沙,410073) 摘要:聚硅碳硅烷(PSCS)与乙酰丙酮铝(Al(AcAc)3)在一定条件反应制备了耐高温SiC(Al)纤维先驱体聚铝碳硅烷(PACS).PACS通过熔融纺丝,预氧化处理,低温烧成,高温烧结等一系列工艺过程制备了耐高温SiC(Al)纤维.SiC(Al)纤维的化学组成为Si1C1.15O0.026Al0.013,主要结构是平均晶粒为95 nm的β-SiC,O和游离C含量均大大低于Nicalon纤维(O>10wt%,游离C>10wt%),同时含有微量的Al和少量的α-SiC.纤维表层O含量和Si含量略高于纤维内部,表面光滑平坦,没有明显表面缺陷. SiC(Al)纤维的平均直径为13 μm,平均强度为2.3 GPa,1400℃氩气中处理1 h,强度保留率95%以......
Al含量对(Ti, Al)N膜结构性能影响的研究进展 李国芳1,王顺花1,石宗利2 (1.兰州交通大学,机电学院,兰州,730070;2.湖南大学,材料科学与工程学院,长沙,410080) 摘要:(Ti, Al)N是在TiN基础上发展起来的一种多元膜,目前Al元素对(Ti,Al)N膜的性能影响研究较多,但是不够系统,而且存在一些矛盾之处.综述了Al元素在(Ti,Al)N膜中的作用机理和Al铝含量对(Ti,Al)N膜结构,抗高温氧化,硬度,耐磨性,结合强度等的影响,指出了(Ti,Al)N膜的发展方向. 关键词:金属材料; (Ti,Al)N膜; 综述; 结构; 性能; [全文内容正在添加中] ......
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in pure Al-ABOw composite fabricated by conventional powder metallurgy technique by blending, cold compaction and sintering. 2 Experimental Aluminium borate whiskers were synthesized by hydrolysis method... milling. Al powder was vigorously mixed with ethanol with magnetic stirring for 40 min, and then ABOw was added in varying contents of 5, 10 and 15 wt.% at 80 °C in vacuum and stirred for another 15......