On the Curie temperature and Nishizawa horn in the Al-Co-Ni system

JOURNAL OF ALLOYS AND COMPOUNDS

卷:779

Article

Zhou, Yang^1,2  Nash, Philip¹ 

[1] IIT, Thermal Proc Technol Ctr, Chicago, IL 60616 USA

[2] Shanghai Jiao Tong Univ, Shanghai Key Lab Adv High Temp Mat & Precis Formi, 800 Dongchuan Rd, Shanghai 200240, Peoples R China

关键词: Magnetic measurements;    High-temperature alloys;    Precipitation;    Thermal analysis;   

DOI  :  10.1016/j.jallcom.2018.11.103

来源: Elsevier

【 摘 要 】

There have been extensive reports on the phase diagram and magnetic properties of the Al-Co-Ni system. However, a systematic investigation of the Curie temperatures in this alloy system is still lacking. In this work, the Curie temperature in the fcc phase field of the Al-Co-Ni alloy system was studied using a simultaneous magnetic balance and differential scanning calorimeter method. The Curie temperature contour map was constructed according to the measured results and an Exponential2D fitting function using Originlab (R) was obtained, which provides a useful tool for estimating the Curie temperature in Al-Co-Ni alloys. The experimental technique provides a novel method of detecting phase transformations and precipitation based on analyzing the heat effects and magnetic behavior of the alloys in the presence or absence of a magnetic field. Experimental results from this technique provide the first evidence for the occurrence of a Nishizawa horn in this system as predicted using Thermo-Calc (R). (C) 2018 Elsevier B.V. All rights reserved.

【 授权许可】

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