Characteristic of specific heat capacity of NiTi alloy phases

来源期刊：中国有色金属学报(英文版)2000年第6期

论文作者：田青超 吴建生

文章页码：737 - 740

Key words：specific heat capacity; NiTi; phase transformation; thermodynamic

Abstract: The specific heat capacity of NiTi alloy at constant pressure using MDSC (Modulated differential scanning calorimeter) was determined. It was found that the variation tendencies of the specific heat capacity for different phases are different. The fitting equations of the specific heat capacity for martensite and austenite phases were presented. Then,a reason, based on thermodynamic point of view, was proposed to explain the difference of the specific heat capacity between martensitic and austenitic phases. Finally, compared with the specific heat capacity of pure Ni and Ti, it was found that the specific heat capacity of NiTi alloy is inherent to that of pure Ti. When the specific heat capacity of NiTi alloy is calculated by Neuman-Kopp, in the temperature region of phase transformation and the temperature higher than 400 K, the results are not desirable.