Development and application of an apparatus for high-temperature measurement of magnetic susceptibility

作者：Ren, Weili^*; Liu, Bin; Liu, Hongyu; Zhong, Yunbo; Yu, Jianbo; Ren, Zhongming; Liang Yongchun; Zhong, Wanli; Liaw, Peter K.

来源：Review of Scientific Instruments, 2015, 86(6): 065105.

DOI：10.1063/1.4922855

• MARTENSITIC-TRANSFORMATION
• CRYSTAL ORIENTATION
• FIELD
• PHASES
• ALLOY

An apparatus for high-temperature measurement of magnetic susceptibility using the modified Gouy method was developed. It can be used at temperatures of up to 1200 degrees C. The apparatus consists of the heating system, weighing system, and temperature-programming controller. The sample should be placed at a position of relatively constant B dB/dz in a gradient magnetic field. Each crucible is used only once for a single measurement to reduce the error. The reliable accuracy and good repeatability of the apparatus are demonstrated by measuring the magnetic susceptibilities of a DD483 superalloy, Ni-based solid solution alloy, and Ni3Al-based solid solution alloy at various temperatures. The results also successfully explain the change in the gamma' precipitation in DD483 superalloys. Therefore, the apparatus provides a convenient and powerful tool for investigating high-temperature phase transitions in the presence of a magnetic field.

• 出版日期2015-6
• 单位上海大学