摘要
本文介绍一种自制双子、差示、高温量热计,此仪器用于测量固态合金的生成焓和相变焓。最高工作温度可达1200℃。通过测定已知焓值的纯铁的相变焓,证明量热计可靠。用这台量热计测量了8种不同成份的Fe-Ni-V固态合金的生成焓,其中包含σ相和γ相。为该体系的热力学研究提供了必要的热化学数据。
A twin, differential, high-temperature calorimeter for the measuremens of enthalpies of formation and transformation in solid alloys has been developed. This apparatus works at temperature up to 1500K. Its sensitivity and reliability are proved by measuring the heats of transformation of α-to γ-phase in iron. The experimental results are in considerable agreement with those in the published literature.
The calorimeter was used to determine the heats of formation of eight alloy compositions, comprising of σ-and γ-phase, of Fe-Ni-V system. These data have not been measured before. The results show that the enthalpies of Fe-Ni-V solid alloys are negative and tend to decrease generally while the composition of alloy varies from Fe-V side to Ni-V side.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
1991年第1期97-101,共5页
Acta Physico-Chimica Sinica
关键词
固态合金
生成焓
相变焓
量热计
Solid alloy, Enthalpies of formatio'n, Enthalpies of transformation, High-temperature Calorimeter
