论文部分内容阅读
根据作者对Fe-Mn基合金系相变与反铁磁转变的研究结果,提出一种反铁磁性r-Fe-Mn-Al-Cr新精密电阻合金的设计方法。研究了Al与Cr对r-Fe-Mn合金残余电阻率、反铁磁转变及伴随的电阻反常变化的影响,Al增加残余电阻率的作用为0.087/μΩ·m/at％,Cr为0.012μΩ·m/at％。当反铁磁有序散射电阻率的增加适能补偿声子散射电阻率的减少时,合金呈现很小的电阻温度系数。据此,在Fe-Mn基合金中由Mn、Al与Cr的优化组合,研制出具有较好综合性能的两种Fe-Mn-Al-Cr精密电阻合金,它们的工作温度范围、电阻率及温度系数大约分別为180～350K、1.00μΩ·m及-20～+20×10~(-6)K~(-1)。Fe-Mn-Al-Cr精密电阻合金的性能虽低于Karma合金,但前者的显著优点是其性能稳定,对热处理工艺不敏感。
According to the author’s research results on the phase transition and antiferromagnetic transition of Fe-Mn based alloys, a new design method of antiferromagnetic r-Fe-Mn-Al-Cr new precision resistive alloy is proposed. The effects of Al and Cr on the residual resistivity, antiferromagnetic transition and accompanying anomalous changes of r-Fe-Mn alloys were investigated. The effect of Al on the residual resistivity was 0.087 / μΩ · m / at% and the Cr was 0.012μΩ · M / at%. When the increase of anti-ferromagnetic ordered scattering resistivity can compensate for the decrease of phonon scattering resistivity, the alloy exhibits a small temperature coefficient of resistance. Accordingly, two kinds of Fe-Mn-Al-Cr precision resistance alloys with better comprehensive properties were developed by optimizing combination of Mn, Al and Cr in Fe-Mn based alloys. Their working temperature range, resistivity and The temperature coefficients are about 180 ~ 350K, 1.00μΩ · m and -20 ~ + 20 × 10 ~ (-6) K ~ (-1), respectively. Fe-Mn-Al-Cr precision resistance alloy performance is lower than the Karma alloy, but the former has the significant advantage of its stable performance, the heat treatment process is not sensitive.