共查询到14条相似文献,搜索用时 274 毫秒
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本文系统研究了(Fe1-xMx)84B16系非晶合金(x=0.02—0.20;M=Ti,Zr,V,Nb,Ta,Cr,Mo,W,Mn,Co,Ni)的晶化温度与组成的关系。晶化温度随M=VIIB,VIB,VB,IVB元素的顺序和x值的增大而提高。M=VIII族(CO,Ni)元素时,晶化温度基本相同,并随x值的增大略有降低。对于被研究的95个Fe基非晶合金,晶化温度在700—825K的约占85%,熔点Tm/晶化温度Tcr约为1/2,在0.42—0.62之间,符合Sakka规则。Fe1-x-yBxSiy的Tcr>Fe1-xBx>Fe1-x-yBxPy。对上述规律性,从组份、扩散、相图以及晶化温度与合金元素外层平均电子浓度/α的关系进行了讨论。
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在0.000 1~2.5 GPa范围不同静水压下,用四探针法详细测量了七种非晶态Fe90-xCrxZr10合金(x=2、4、7、10、13、16、20)的电阻率。结果表明:(1)常压室温电阻率ρ0与FeZr基非晶合金中Cr含量成N形曲线关系;(2)当静水压增加时,七种非晶合金的约化电阻率(ρ/ρ0)都单调下降,x越大则电阻率下降的幅度越小;(3)非晶Fe90-xCrxZr10合金电阻率的压力系数对x的变化相当敏感;(4)为方便查值,给出了六种典型静水压下ρ/ρ0与x的曲线关系。最后,讨论了四种物理模型的选用以及相干交换散射在高压下的行为。 相似文献
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Temperature dependence (3–300 K) of the electrical conductivity in a number of amorphous Zr1?xMx alloys (M = Cu, Ni, Co and Fe, 0.19 < x < 0.71) has been analysed in some detail. Like in some other alloys with a high electrical resistivity, the conductivity varies as T at lower temperatures (T < 80 K) and √T at higher temperatures. A new feature observed is that the ratio of the coefficients of a low temperature T and a high temperature √T conductivity variation is practically constant for allalloys. Therefore a universal conductivity-temperature curve can be constructed for all amorphous Zr1?xMx alloys with the resistivity higher than 150 μohms cm. These results are consistent with the effects of incipient localisation and indicate that the electron-phonon coupling determines the conductivity variation. 相似文献
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The role of the outer electrons on the limits of solubility and bulk magnetic properties of the system Fe3-xTxSi (T - Ti, V, Cr, Mn, Co, Ni) is investigated. A correlation with the magnetic and structural behavior of Fe1-cSic and Fe1-cAlc alloys is demonstrated. 相似文献