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STRUCTURE AND FORMATION MECHANISM OF DISLOCATION NETWORKS IN TiAl^+

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Journal of Central South University 1995年第1期7卷 12-15页

作者： Qu Xuanhui Huang Baiyun(Powder Metallurgy Research Institute, Central South University of Technology, Changsha, 410083, China)

The structure and characteristics of dislocation networks in Ti50 Al ordered alloy deformed at room temperature were studied by means of TEM diffraction contrast analysis technique. The results show that the observed... 详细信息

关键词： ordered alloy intermetallic compound dislocation networks TEM ductility/TiAl titanium aluminide

A HIGH-HARDNESS COMPOUND IN THE Ag-Cu-Zr SYSTEM

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Chinese Science Bulletin 1986年第9期31卷 615-617页

作者：张康侯赵怀志周月华 Institute of Precious Metals Kunming Institute of Precious Metals Kunminghere are two intermetallic compounds of AgZr and AgZr_2 in the Ag-Zr systemand six intermetallic compounds of Cu_9Zr_2 Cu_7Zr_2 Cu_(52) CuZr and CuZr_2 in the Cu-Zr system.The Ag-Cu system is an entectic system with solid solubility.Although

There are two intermetallic compounds of AgZr and AgZr2 in the Ag-Zr system,and six intermetallic compounds of Cu9Zr2, Cu7Zr2, Cu52, CuZr and CuZr2 in the Cu-Zr *** Ag-Cu system is an entectic system with solid ***,

关键词： intermetallic solubility tetragonal argon ternary 瓜山 compo melting libration 公班

Effect of Nb Addition on the Corrosion Behavior of Porous TiAl Based Alloys in Aqueous Environments

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Effect of Nb Addition on the Corrosion Behavior of Porous Ti...

中国材料大会2012

作者： Fan Yang Xiao Li Nan Tian Yongfeng Liang Junpin Lin State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing

ISBN: (纸本)9783037856086;3037856084

The corrosion behavior of porous Nb-containing TiAl based alloys in HCl, NaOH and NH3·H2O aqueous solutions with various concentrations has been studied simultaneously at room temperature. The results indicate that the porous alloys have good acidic resistance which is probably based on the combined work of Ti-Ti metallic bond and covalent bond. And pitting corrosion is the main corrosion behavior of Nb-free TiAl alloys during the first 40 hours, while intergranular corrosion is the main corrosion behavior later. Nb-containing alloys have better acid corrosion resistance due to inhibiting intergranular corrosion by Nb element. In addition, the porous TiAl based alloys are much more resistant to corrosion in alkaline solutions than in acidic solutions, owing to the different oxide films formed in alkalis solutions.

关键词： TiAl based alloy intermetallic Porous material Corrosion resistance

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Pt3Co电催化剂的表面组成调控

Pt3Co电催化剂的表面组成调控

CALCULATION OF MAGNETOCRYSTALLINE ANISOTROPY OF Nd_(2)Fe_(14)B

中国化学会第30届学术年会-第二十九分会：电化学材料

作者：张宗成姜艳霞孙世刚厦门大学化学化工学院化学系固体表面物理化学国家重点实验室

PtM(M=Fe,Co,Ni等)双金属纳米粒子电催化剂广泛应用于燃料电池等能源储存和转化装置。非贵金属M的加入不仅降低了Pt的使用量,而且Pt与M之间的协同效应使其具有优异的电催化性能。PtM双金属催化剂由于Pt与M两种金属的性质差异(表面能、... 详细信息

PtM(M=Fe,Co,Ni等)双金属纳米粒子电催化剂广泛应用于燃料电池等能源储存和转化装置。非贵金属M的加入不仅降低了Pt的使用量,而且Pt与M之间的协同效应使其具有优异的电催化性能。PtM双金属催化剂由于Pt与M两种金属的性质差异(表面能、晶格参数、键能等)在退火热处理中会出现一种金属的表面偏析。因而精确系统地控制偏析条件可以优化PtM等双金属催化剂的表面组成和化学态,可控地设计合成能满足实际需求的催化剂。本文以高比表面的多空碳为载体,使用浸渍和熔融扩散法负载Pt盐和Co盐的前驱体,进一步还原制备负载型PtCo催化剂。通过改变热处理条件,利用双金属的偏析规律达到表面组成调控的目的,制备了Co-increased,intermetallic和Pt-increased三种不同表面组成的催化剂,并用CO stripping、XPS、LEIS、STEM-EDX Mapping等表征了表面组成。目前氢气大都为重整气,含有约100ppmCO。因为PtCo对CO氧化电位提前,使其在阳极氢氧化过程中表现出很高的CO耐受性,高的电催化活性和稳定性。

关键词：电催化 Pt3Co intermetallic 表面组成 CO tolerance

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Chinese Physics Letters 1985年第3期2卷 109-112页

作者： LU Xiao-jia XU You YANG Gui-lin ZHAI Hong-ru LIU Ying-lie Shanghai Institute of Metallurgy Academia SinicaShanghai Department of Physics Nanjing UniversityNanjingJiansu Institute of Physics Academia SinicaBeijing

The contribution of Nd^(3+)ions to the magnetocrystalline anisotropy of intermetallic compound Nd2Fe14B was calculated by single ion *** results explained the high anisotropy of Nd-Fe-B *** adjusting the shielding fac... 详细信息

关键词： alloy. intermetallic theory.

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磁性材料

电子科技文摘 2003年第6期 9-9页

0311778在室温和常压下用机械合金化方法制备Fe5-C2金属间化合物[刊]/何正明//上海大学学报（英文版）,—2003,7（1）,—84～86（E）Single phase Fe5-C2 intermetallic compound was pre-pared by mechanical alloying *** phase andcrystal structure of sample were analyzed with X-ray dif-feraction *** decomposing temperature of theFe5-C2 compound is 596.4℃ determined by the

关键词： decomposing 机械合金化 intermetallic 金属间化合物铁氧体材料上海大学 alloying 磁芯正明起始磁导率