Li Chunhong, Ruan Hui, Chen Dengming, Li Kejian, Guo Donglin, Shao Bin
School of Metallurgy and Materials Engineering, Chongqing University of Science & Technology, Chongqing 401331, China.
The Center of Material Analysis and Testing, Chongqing University of Science & Technology, Chongqing 401331, China.
Microsc Res Tech. 2018 Jul;81(7):796-802. doi: 10.1002/jemt.23038. Epub 2018 Apr 20.
A Ni-based alloy was heat treated by changing the temperature and ambient atmosphere of the heat treatment. Morphology, crystal structure, and physical performance of the Ni-based alloy were characterized via SEM, XRD, TEM, and PPMS. Results show that due to the heat treatment process, the grain growth of the Ni-based alloy and the removal of impurities and defects are promoted. Both the orientation and stress caused by rolling are reduced. The permeability and saturation magnetization of the alloy are improved. The hysteresis loss and coercivity are decreased. Higher heat treatment temperature leads to increased improvement of permeability and saturation magnetization. Heat treatment in hydrogen is more conducive to the removal of impurities. At the same temperature, the magnetic performance of the heat-treated alloy in hydrogen is better than that of an alloy with heat treatment in vacuum. The Ni-based alloy shows an excellent magnetic performance on 1,373 K heat treatment in hydrogen atmosphere. In this process, the µ , B , P , and H of the obtained alloy are 427 mHm , 509 mT, 0.866 Jm , and 0.514 Am , respectively. At the same time, the resistivity of alloy decreases and its thermal conductivity increases in response to heat treatment.
通过改变热处理的温度和环境气氛对镍基合金进行热处理。通过扫描电子显微镜（SEM）、X射线衍射仪（XRD）、透射电子显微镜（TEM）和物理性能测量系统（PPMS）对镍基合金的形貌、晶体结构和物理性能进行了表征。结果表明，由于热处理过程，促进了镍基合金的晶粒生长以及杂质和缺陷的去除。轧制引起的取向和应力均降低。合金的磁导率和饱和磁化强度得到提高。磁滞损耗和矫顽力降低。更高的热处理温度导致磁导率和饱和磁化强度的改善增加。在氢气中进行热处理更有利于杂质的去除。在相同温度下，在氢气中热处理的合金的磁性能优于在真空中热处理的合金。镍基合金在氢气气氛中1373K热处理时表现出优异的磁性能。在此过程中，所得合金的磁导率（µ）、磁感应强度（B）、功率损耗（P）和矫顽力（H）分别为427mH/m、509mT、0.866J/m和0.514A/m。同时，合金的电阻率随着热处理而降低，其热导率增加。
