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Trans. Nonferrous Met. Soc. China 31(2021) 2220-2231 Correlations among stress corrosion cracking, grain-boundary microchemistry, and Zn content in high Zn-containing Al-Zn-Mg-Cu alloys Ding... among the corrosion behaviour, grain-boundary microchemistry, and Zn content in Al-Zn-Mg-Cu alloys were studied using stress corrosion cracking (SCC) and intergranular corrosion (IGC) tests, combined......
合金,通过末端淬火的方法研究其淬火敏感性,结合透射电镜微观组织观察结果就m(Zn)/m(Mg)对淬火敏感性的影响机理进行分析和探讨.研究结果可为密度更低的高强高韧高淬透性Al-Zn-Mg-Cu合金的研发提供参考. 1 实验 通过熔炼铸造获得Al-3Zn-4.5Mg-1Cu,Al-4Zn- 3.5Mg-1Cu和Al-5Zn-3.5Mg-1Cu 3种合金.原材料采用高纯铝锭,锌锭,镁锭,铝... content on quench sensitivity of Al-Zn-Mg-Cu aluminum alloys[J]. Journal of Alloys and Compounds, 2011, 509(13): 4636-4642. [8] LIVAK R J, PAPAZIAN J M. Effects of copper on precipitation and quench......
Zn(Ⅱ)-(NH4)2SO4-H2O体系中锌的电积宋丹娜1,张鹏2,唐谟堂3(1.北京市环境科学研究院2.中南大学 冶金科学与工程学院,长沙 4100833.中南大学 冶金科学与工程学院, 长沙 410083)摘 要:研究采用Zn(Ⅱ)-(NH4)2SO4-H2O体系从高氟和氯锌烟尘中回收锌新工艺的电积过程.结果表明,在阴极电流密度400A·m-2,温度60℃,起始Zn2+浓度60g·L-1,异极矩3cm,时间4h的最佳电积条件下,所得电锌品位>99.97%,阴极锌析出率为83.09%,电流效率92.88%,电能消耗3618kW.h.关键词:冶金技术; 锌电积; 硫酸铵; 高氟氯锌烟尘; 电解槽......
:TG146.2 文献标志码:A Effect of aging treatment on corrosion properties of high Zn content super-high strength Al alloy RAN Fan-qing, CHEN Zi-yong, GAO Kun-yuan, NIE Zuo-ren (School... susceptibility of the high Zn content super-high strength Al alloy was studied using optical microscopy (OM), scanning electron microscopy (SEM) and transmission election microscopy (TEM). The results show......
that the lattice parameters of nano-scale Ni(OH)2 are changed and the agglomeration of particles becomes obvious with the increased Zn-doped content. Compared with un-doped one, the discharge specific capacities... is still above 85% of its initial capacity discharged at 0.2C. Therefore, a suitable Zn-doped content is beneficial to improving the discharge performance of nano-scale Ni(OH)2. Key words: nano......
2010 Abstract: The roles of Zn content and thermo-mechanical treatment in affecting microstructures and mechanical properties of Mg-x%Zn-1%Mn (mass fraction, x=4, 5, 6, 7, 8, 9) wrought Mg alloys were investigated. The microstructure was extremely refined by dynamic recrystallization (DRC) during extrusion. With increasing Zn content, the DRC grains tended to grow up, at the same time, more......
of K, Cl and other elements, then the enrichment, called Zn-rich material, is obtained with the content of Zn up to 90%. At the same time, the dusts are reduced at the state of non-molten because...,粉尘非熔态还原过程产生的含Zn 挥发物经收集,水洗,可富集得到含Zn量高达90%的富Zn物料. REFERENCES [1] 王东彦, 王文忠, 陈伟庆, 周荣章. 转炉和含锌铅高炉尘泥的物性和物相分析[J]. 中国有色金属学报, 1998, 8(1): 135-139. WANG Dong-yan, WANG Wen-zhong, CHEN Wei-qing, ZHOU Rong-zhang......
Abstract: The effects of Zn content on strength and wear performance of Al-12Si-3Cu alloy synthesized by gravity casting were systematically investigated. The microstructure and mechanical properties...-Zn alloys increased with increasing Zn content, but tendency in the tensile and compressive strengths and ductility reversed after adding 1.5%-2% Zn. In addition, the friction coefficient and volume......
Zn含量较低,AB2和AB5型相的含量并不发达,最终形成了高丰都的A2B7型相. 表2 三种合金的晶胞参数和相对含量 Table 2 Crystal structure, cell parameters and phase content of three kinds of alloys 图3 Zn在不同相中的固溶量和各相丰度随Zn含量的变化 Fig. 3...力几乎相当.但需要注意的是,合金3#中含有更多的AB5型相.作者前期的研究[32]表明,AB5型相的显微硬度较高,是更易粉化的相.因此,虽然合金1#和3#粉化特征相似,但考虑两者相组成的差异,Zn的加入还是有利于合金抗粉化能力的改善. 表4 合金1#和3#浸泡后的氧含量及气态循环后的粒度分析 Table 4 Oxygen content and particle size......
(Ⅱ)-NH3-Cl--CO32--H2O体系中Zn(Ⅱ)配合平衡热力学,求出氨水浓度和氯离子浓度在0~10 mol/L范围内变化时,体系中各物种的平衡浓度,绘制热力学平衡图,并对热力学计算结果进行实验验证和差异分析.结果表明:锌离子浓度理论计算值与实验值之间的平均相对误差为7.47%,这说明该热力学模型是正确的,所选数据的准确性较好. 关键词:热力学;Zn(Ⅱ)配合平衡;双平衡法 中图分类号:TF...没有考虑CO32-对平衡的影响.而实际上在氧化锌矿中大量存在的氧化锌物相是碱式碳酸锌,单纯的ZnO物相几乎没有,碱式碳酸锌溶解后生成大量的CO32-,对体系平衡有着重大影响.石西昌等[9]研究了Zn-Cl--NH3-CO22--H2O系的热力学,也同样没有考虑ZnCl3(NH3)-等复杂配合物,更没有考虑电荷平衡.因此在工程应用时,这些关于金属Zn或者ZnO与氨和氯之间的平衡热力学研究成果具有一定......