Study of mechanically synthesized carbide Fe7C3
Study of mechanically synthesized carbide Fe7C3
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机械合成硬质合金Fe7C3的研究
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
V. T. Surikov
中科院分区：
文献类型：
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作者：
V. Barinov;V. Tsurin;V. T. Surikov
研究了在甲苯中机械合成α-铁制备的Fe7C3碳化物的磁性和超细相互作用。结果表明，MS碳化物的温度稳定边界不超过775 K。合成相的居里温度在509 ~ 525 K之间变化。Mössbauer实验（57Fe）表明，Fe7C3的晶胞包含32个铁原子，分布在5种不同的晶体位置上，多重度为4:8:8:8:4。计算了各非等效位置的超精细相互作用参数。从温度≥775 K时的具体分解特征可以推测，MS碳化物中Fe-C相变最可能的顺序是→θ，其中-Adcock碳化物Fe7C3。
Magnetic properties and hyperfine interactions in the carbide Fe7C3 prepared by mechanical synthesis (MS) of α-Fe in toluene have been studied. It has been found that the boundary of temperature stability of the MS carbide does not exceed 775 K. The Curie temperature of the synthesized phase varies between 509 and 525 K. The Mössbauer experiments (57Fe) have demonstrated that the unit cell of Fe7C3 contains 32 iron atoms distributed over five types of crystallographic positions with a multiplicity of 4: 8: 8: 8: 4. The hyperfine interaction parameters have been calculated for each nonequivalent position. It may be conjectured from the specific features of the decomposition at T ≥ 775 K that the most probable sequence of the phase transitions in the MS carbides Fe-C is → θ, where -Adcock carbide Fe7C3.