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Gd₅Ge₂(Si_2-xAl_x)合金的结构和显微组织分析

Analysis of Structure and Microstructure of Gd₅Ge₂(Si_2-xAl_x) Alloys

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【Author】 LEI Yu 1a,2,LUO Guang-sheng1a,XIN Yong1b,LIU Guang-hua1a,ZHOU Zheng-you1a (1a.School of Materials Science and Engineering,Nanchang University,Nanchang 330031,China;1b.School of Sciences,Nanchang University,Nanchang 330031,China; 2.College of Tecknology,East China Jiaotong University,Nanchang 330013,China)

【机构】南昌大学材料科学与工程学院；南昌大学理学院；南昌大学材料科学与工程学院江西南昌330031华东交通大学职业技术学院；江西南昌330013；江西南昌33003；

【摘要】利用金相显微镜、扫描电镜(SEM)、X射线衍射仪(XRD)及差示扫描量热(DSC)等方法对化合物Gd5Ge2(Si2-xAlx)(x=0,0.1,0.2,0.5,1.0)的结构和显微组织进行了研究。结果表明:随着Al替代Si量的增加,晶格常数(a、c)和晶胞体积(V)均增加。x=1.0时,杂质相明显出现,且主相、杂质相的居里温度会随着x含量的增加而增加。更多还原

【Abstract】 The crystal structure and microstructure of alloys Gd5Ge2(Si2-xAlx) were studied by X-Ray Diffraction(XRD),Scanning Electronic Microscope(SEM)and Differential Scanning Calorimetry(DSC) methods.The results of experiment indicate that the lattice constants a,c and the unit-cell volume V increase with the increase of the substitution of Al for Si.The impurity phase exhibites obviously as x=1.0.The curie temperatures Tc of the main phase and the impurity phase increase obviously with Al atom content.更多还原