Hydrogen absorption of NdDyFeCoNbCuB sintered magnets
来源期刊：Journal of Rare Earths2009年第3期
论文作者：罗建军 De Rango P 梅金娜 胡锐 李金山 周廉
文章页码：520 - 524
摘 要：Hydrogen absorption and desorption characteristics for high coercivity NdDyFeCoNbCuB sintered bulk magnets were studied,by differential scanning calorimetry（DSC） measurement and hydrogenation kinetics measurement. The DSC measurements showed that hydrogenation of Nd-rich phase occurred in the temperature range of 40-185 °C,hydrogenation of the tetragonal（Φ） phase in the temperature range of 185-220 °C,as well as the disproportionation of the Φ phase that occurred in a broad temperature range from around 500 to 800 °C. The hydrogenation kinetics measurements indicated that hydrogen absorption of the bulk magnets at 50 °C absorbed more hydrogen than at 150 °C,although this procedure was slower at 50 °C than at 150 °C. This phenomenon was discussed by means of pres-sure-concentration-temperature（p-c-T） diagrams.
罗建军1,2，De Rango P3,4，梅金娜1,4，胡锐1，李金山1，周廉1
1. State Key Laboratory of Solidification Processing,Northwestern Polytechnic University
摘 要：Hydrogen absorption and desorption characteristics for high coercivity NdDyFeCoNbCuB sintered bulk magnets were studied,by differential scanning calorimetry（DSC） measurement and hydrogenation kinetics measurement. The DSC measurements showed that hydrogenation of Nd-rich phase occurred in the temperature range of 40-185 °C,hydrogenation of the tetragonal（Φ） phase in the temperature range of 185-220 °C,as well as the disproportionation of the Φ phase that occurred in a broad temperature range from around 500 to 800 °C. The hydrogenation kinetics measurements indicated that hydrogen absorption of the bulk magnets at 50 °C absorbed more hydrogen than at 150 °C,although this procedure was slower at 50 °C than at 150 °C. This phenomenon was discussed by means of pres-sure-concentration-temperature（p-c-T） diagrams.
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