Y3（Fe,Mo）29金属间化合物的结构特性

使用Ｒｉｅｔｖｅｌｄ方法对Ｙ３（Ｆｅ,Ｍｏ）２９金属间化合物的Ｘ射线衍射谱和中子衍射谱进行分析,得出了Ｙ３（Ｆｅ,Ｍｏ）２９金属间化合物Ａ２／ｍ空间群的结论。坐标变换结果表明：Ｙ３（Ｆｅ,Ｍｏ）２９金属间化合物的空间结构是１：１２和２：１７的混合特性。     

Y_3(Fe,M0)_(29)金属间化合物的结构特性

使用Rietveld方法对Y3（Fe,Mo）29金属间化合物的X射线衍射谱和中子衍射谱进行分析,得出了Y3（Fe,Mo）29金属间化合物属A2／m空间群的结论.坐标变换结果表明Y3（Fe,Mo）29金属间化合物的空间结构是1∶12和2∶17的混合结构     

CRYSTALLIZATION KINETICS OF Pd(Fe,Co,Ni)_(0.05-0.15)Si_(0.17) METALLIC GLASSES

用测量等温退火过程中试样的电阻变化对Pd(Fe,Co,Ni)_(0.05-0.15)Si_(0.17)金属玻璃的结晶动力学进行了研究。在等温退火过程中,试样的电阻下降一般为10—20％,Pd-Fe-Si系试样的电阻变化直接与含Fe量有关,Pd_(0.78)Fe_(0.05)Si_(0.17)在等温结晶中电阻反而升高。从动力学观点看,在Pd-Si系中添加Fe,Co和Ni使结晶活化能增加,结晶模式指数减小,从而使金属玻璃变得稳定。衡量金属玻璃的稳定性要同时考虑其热力学稳定性和动力学稳定性。     

Mn和Mg对Al-5Fe合金初生Al3Fe相形貌的影响

Mn和Mg添加到Al-5Fe(质量分数，％，下同)合金中，初生Al3Fe相的形貌发生明显变化．未加入合金元素时，该合金中的初生Al3Fe相长成粗大的针片状；加入2．5％Mn和0．1％Mg(质量分数，下同)后，粗大的初生富铁相消失，取而代之的是细小针状、粒状和花朵状；加入2．5％Mn和1．5％Mg，合金中的富铁相大部分转变为粒状和穗状(分叉状)两种．探讨了粒状和穗状的形成机理．对合金力学性能的测试表明，加入Mn和Mg后，合金的抗拉强度得到了不同程度的提高：Al～5Fe合金为107MPa，Al-5Fe-2．5Mn-0．1Mg合金为139MPa，Al-5Fle-2．5Mn-1．5Mg合金为122MPa，增长幅度分别为29．9％和14％．     

Characterization and Wear Properties of Fe3Al and (Fe,Ti)3Al Intermetallic Claddings Produced by GTAW Process

Protection of Metals and Physical Chemistry of Surfaces - In this study, Fe3Al and (Fe,Ti)3Al intermetallic coatings were applied on the surface of CK45 steel by GTAW process. For this purpose,...     

THERMODYNAMICS OF Cu-Y-M(M=Al,Si,Ti,Fe)LIQUID SOLUTIONS

ＴＨＥＲＭＯＤＹＮＡＭＩＣＳＯＦＣｕ－Ｙ－Ｍ（Ｍ＝Ａｌ，Ｓｉ，Ｔｉ，Ｆｅ）ＬＩＱＵＩＤＳＯＬＵＴＩＯＮＳ￥Ｄｕ，Ｔｉｎｇ；Ｌｉ，Ｇｕｏｄｏｎｇ（ＣｅｎｔｒａｌＩｒｏｎａｎｄＳｔｅｅｌＲｅｓｅａｒｃｈＩｎｓｔｉｔｕｔｅ，Ｂｅｉｊｉｎｇ１０００８１）Ａｂ...     

Ti(C,N)中非化合氮的测定

脉冲加热 -气相色谱热导法测定了 Ti( C,N )中的非化合氮。通过阶梯升温法确定了最佳的分析条件。并与加热 -氢萃取法比较 ,证明本方法简便、可靠性更高     

CRYSTALLIZATION KINETICS OF THE METALLIC GLASS Zr_(75.9)Ni_(24.1)

借助于DSC的峰分析和随后的计算机数据处理,确定了金属玻璃Zr_(75.9)Ni_(24.(?))在恒温和连续升温两种结晶过程的动力学参数及TTT曲线.相应的有效激活能分别是224和194kJ/mol,反应指数分别是3.38和3.77.推测这是一个成核速率下降的共晶结晶过程.这与Altounian等人以及我们自己的X光衍射实验结果相一致.文中还对恒温和连续升温两种差热分析技术作了简短的讨论.     

Mo、Ni含量与Ti(C,N)基金属陶瓷组织和性能之间的关系

本文研究了Mo、Ni含量对Ti（C，N）基金属陶瓷组织和性能的影响．结果表明，Mo、Ni含量对组织和性能有很大影响，化学成分决定了组织和性能．     

Moisture-induced embrittlement mechanism for (Ni,Fe)Ti alloys

Recent experimental studies showed that the ductility of NiTi is not affected by moisture, while addition of iron beyond 9 a/o in NiTi leads to moisture-induced embrittlement. To explore the nature of this embrittlement, we studied the chemical interaction between water vapor and (Ni,Fe)Ti(110) surfaces with 5 a/o and 10 a/o Fe. Temperature-programmed desorption and X-ray photoelectron spectroscopy show that decomposition of water to produce atomic hydrogen occurs on both surfaces. Activation energy for surface diffusion was calculated by density functional theory, showing that addition of Fe decreases H surface diffusivity, in agreement with experiment. Together with the observation that addition of 9 a/o Fe increases the strength of NiTi, this indicates that moisture-induced embrittlement in higher strength NiTi alloys is not due to faster H surface diffusion, but lower critical hydrogen concentration required for embrittlement.     

(Nb,Ti)C的制备方法对(Nb,Ti)C-35Ni金属陶瓷的微观结构及性能的影响

用自蔓燃高温合成（SHS）技术及电弧熔融法制备的（Nb，Ti）C固溶体作基体，制备（Nb，Ti）C－35Ni金属陶瓷。结果表明用电弧熔融法制备的（Nb，Ti）C为基的试样具较优的室温力学性能（σ＝1630MPa，KIC＝18．0MPa），其陶瓷颗粒均匀分行粘结相之中并是包裹结构；而用SHS法制备的（Nb，Ti）C为基的试样其力学性能相对较差，其陶瓷颗粒无包裹结构．     

工艺流程对热等静压试样性能的影响

研究了热等静压工艺流程对 Ti(C,N )基金属陶瓷组织与性能的影响。结果表明 ,在热等静压前进行固相烧结和液相烧结是重要的     

Metal dusting of Fe3Al and (Fe,Ni)3Al

Metal dusting is a deterioration of metallic materials in strongly carburizing atmospheres under disintegration into a dust of carbon and fine metal particles (coke). The intermetallic compound Fe₃Al is also very susceptible to metal dusting and disintegrates under formation of vast amounts of coke. The mechanism corresponds to the metal dusting of iron and steels, Fe₃C is formed as an intermediate and the Al is oxidized. With increasing Cr-addition and with increasing Ni-content in alloys (Fe,Ni)₃Al-Cr the materials become more resistant, Ni₃Al is not attacked by metal dusting.     

Hydrogen storage behaviors and microstructure of MF3 (M=Ti, Fe)-doped magnesium hydride

MgH2+10%MF3(M=Ti,Fe)(mass fraction) composites were prepared by ball-milling in hydrogen atmosphere,and their hydrogen storage behaviors and microstructure were investigated systematically.The results show that the hydriding and dehydriding kinetics of MgH2 are markedly improved by doping TiF3 and FeF3 fluorides.At 573 K,the two composites can absorb 5.67%-6.07%(mass fraction) hydrogen within 5 min under an initial hydrogen pressure of 3.5 MPa,and desorb 5.34%-6.02% hydrogen within 6 min.Furthermore,the composites can absorb hydrogen rapidly in moderate temperature range of 313-473 K.In comparison,TiF3-doped sample has a better hydriding-dehydriding kinetics than FeF3-doped sample.The microstructure analysis shows that some active particles including MgF2,TiH2 and Fe could be formed in the hydriding-dehydriding processes of the MF3-doped composites.From the Kissinger's plot,the apparent activation energies for the hydrogen desorption of the composites are estimated to be 74.1 kJ/mol for TiF3-doped composite and 77.6 kJ/mol for FeF3-doped composite,indicating MgH2 is significantly activated due to the catalytic effect of the doping of MF3.     

炼铁高炉内Ti(C,N)生成的研究SCIEI

高炉内Ti(C,N)的生成,主要以渣-焦反应和渣-铁反应两种途径进行。两者形成的状态和机理不同。在渣-焦界面上,首先生成TiC,然后气相中氮原子向TiC晶格中扩散,形成间隙固溶体Ti(C,N),它的化学组成是不均匀的,渣中碱度和温度的变化,对Ti(C,N)的生成影响极大,渣-焦界面积愈大,愈有利Ti(C,N)的生成。