期刊文献+
共找到4篇文章
< 1 >
每页显示 20 50 100
Effects of spinning rate on structures and electrochemical hydrogen storage performances of RE-Mg-Ni-Mn-based AB_2-type alloys 被引量:6
1
作者 Yang-huan ZHANG Wei ZHANG +3 位作者 xi-ping song Pei-long ZHANG Yong-guo ZHU Yan QI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第12期3219-3231,共13页
La was partially substituted by Ce with the aim of improving the electrochemical hydrogen storage performances ofLa1–xCexMgNi3.5Mn0.5 (x=0, 0.1, 0.2, 0.3, 0.4) alloys, and melt spinning technology was adopted to fabr... La was partially substituted by Ce with the aim of improving the electrochemical hydrogen storage performances ofLa1–xCexMgNi3.5Mn0.5 (x=0, 0.1, 0.2, 0.3, 0.4) alloys, and melt spinning technology was adopted to fabricate the alloys. Theidentification of XRD and SEM reveals that the experimental alloys consist of a major phase LaMgNi4 and a secondary phase LaNi5.The growth of spinning rate results in that the lattice constants and cell volume increase and the grains are markedly refined. Theelectrochemical measurement shows that the as-cast and spun alloys can obtain the maximum discharge capacities just at the firstcycle without any activation needed. With the increase of spinning rate, the discharge capacities of the alloys first increase and thendecline, whereas their cycle stabilities always grow. Moreover, the electrochemical kinetic performances of the alloys first increaseand then decrease with spinning rate growing. 展开更多
关键词 Ni.MH battery hydrogen storage melt spinning discharge capacity KINETICS
下载PDF
Fatigue small crack growth threshold determination of a high-Nb TiAl alloy at different temperatures by in-situ observation 被引量:2
2
作者 Min Zhang xi-ping song +3 位作者 Long Yu Hong-liang Li Ze-hui Jiao Hui-chen Yu 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2013年第12期1192-1197,共6页
The purpose of this paper is to estimate the fatigue crack growth threshold of a high-Nb TiAl alloy at the different temperatures based on scanning electron microscopy (SEM) in-situ observation. The results indicate... The purpose of this paper is to estimate the fatigue crack growth threshold of a high-Nb TiAl alloy at the different temperatures based on scanning electron microscopy (SEM) in-situ observation. The results indicated that the fatigue crack growth threshold △Kth of a nearly lamellar high-Nb TiAl alloy with 8% Nb content at room temperature and 750℃ was determined as 12.89 MPa.m^1/2 and 8.69 MPa.m^1/2, respectively. The effect of the elevated temperature on the fatigue crack growth threshold cannot be ignored. At the same time, the early stage of fatigue crack propagation exhibited multicrack initiation and bridge-link behavior. 展开更多
关键词 titanium aluminum alloys NIOBIUM fatigue crack propagation high temperature testing
下载PDF
Tensile properties of tungsten-rhenium wires with nanofibrous structure 被引量:1
3
作者 Na-na Qiu Yin Zhang +2 位作者 Cheng Zhang Huan Tong xi-ping song 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2018年第9期1055-1059,共5页
In this study, the mechanical properties of tungsten-rhenium wires with nanofibrous microstructure were investigated at both room temperature(RT) and 800?C. The strengthening mechanism associated to the nanofibrous mi... In this study, the mechanical properties of tungsten-rhenium wires with nanofibrous microstructure were investigated at both room temperature(RT) and 800?C. The strengthening mechanism associated to the nanofibrous microstructure was discussed. The results showed that the tungsten-rhenium wires with nanofibrous grains exhibited a very high tensile strength reaching values of 3.5 GPa and 4.4 GPa for the coarse(grains diameter of 240 nm) and fine(grains diameter of 80 nm) wires, respectively. With increasing the temperature from RT to 800?C, the tensile strength decreased slightly but still held high values(1.8 GPa and 3.8 GPa). All the fracture surfaces exhibited apparent necking and characteristics of spear-edge shaped fracture surface, indicating excellent ductility of the wires. A model of the strengthening mechanism of these tungsten-rhenium wires was proposed. 展开更多
关键词 tungsten-rhenium WIRE mechanical properties nanofibrous microstructure TENSILE STRENGTH
下载PDF
Structure and electrochemical performances of Mg20-xYxNi10(x=0-4) alloys prepared by mechanical milling
4
作者 Yang-Huan Zhang xi-ping song +3 位作者 Pei-Long Zhang Yong-Guo Zhu Hui-Ping Ren Bao-Wei Li 《Rare Metals》 SCIE EI CAS CSCD 2019年第10期954-964,共11页
Mg2Ni-type Mg20-xYxNi10(x=0,1,2,3 and4) electrode alloys were fabricated by vacuum induction melting.Subsequently,the as-cast alloys were mechanically milled on a planetary-type ball mill.The effects of milling time a... Mg2Ni-type Mg20-xYxNi10(x=0,1,2,3 and4) electrode alloys were fabricated by vacuum induction melting.Subsequently,the as-cast alloys were mechanically milled on a planetary-type ball mill.The effects of milling time and Y content on the microstructures and electrochemical performances of the alloys were investigated in detail.The results show that nanocrystalline and amorphous structure can be successfully obtained through mechanical milling.The substitution of Y for Mg facilitates the glass forming of the Mg2Ni-type alloy and significantly enhances the electrochemical characteristics of the alloy electrodes.Moreover,the discharge capacity of Y-free alloy monotonously grows with the milling time prolonging,while that of the Y-substituted alloys has the maximum values in the same case.The milling time of obtaining the greatest discharge capacity markedly decreases with Y content increasing.The electrochemical kinetics of the alloys,including high rate discharge ability(HRD),diffusion coefficient(D),limiting current density(IL) and charge transfer rate,monotonously increase with milling time extending. 展开更多
关键词 Mg2Ni-type alloy Y SUBSTITUTION for Mg MILLING DURATION ELECTROCHEMICAL PERFORMANCES
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部