A Calorimetric Study of Iron–Cobalt Alloys
A Calorimetric Study of Iron–Cobalt Alloys
复制标题
铁钴合金的量热研究
DOI：
10.1179/030634575790444658
复制
发表时间：
1975
期刊：
影响因子：
--
通讯作者：
B. Argent
中科院分区：
文献类型：
--
作者：
A. Normanton;P. Bloomfield;F. Sale;B. Argent
摘要：绝热热量计已被用来测量铁-钴合金在 700-1500 K 温度范围内的热容量和转变热。对与磁性和构型无序相关的熵的估计表明，约 75% 的磁有序度因居里温度而丢失，尽管布拉格-威廉姆斯理论正确预测了无序 FeCo 的熵，但它高估了无序熵。 合金远离理想的有序成分。给出了 α→γ 转变、有序反应和居里温度的相图信息。
AbstractAn adiabatic calorimeter has been used to measure heat capacities and heats of transformation for iron–eobalt alloys over the temperature range 700–1500 K. Estimates of the entropy associated with magnetic and configurational disorder suggest that ∼75% of the magnetic order is lost by the Curie temperature and that although the Bragg–Williams theory correctly predicts the entropy of disordering FeCo, it overestimates the entropy of disordering alloys away from the ideal ordering compositions. Phase-diagram information for the α→γ transformation, the ordering reaction, and the Curie temperature are given.