LIQUID-PHASE SINTERING OF SmCo5.

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作者：
Jorgensen, P.J.
Bartlett, R.W.
机构：
[1] Stanford Research Institute, Menlo Park, CA 94025, United States
[2] Stanford University, Stanford, CA 94305, United States
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| 1600年 / 44期
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摘要：
The initial sintering kinetics of stoichiometric SmCo//5 powder containing a samarium-rich sintering addition (60 wt% Sm plus 40 wt% Co) have been investigated as a function of amount of liquid phase, time, temperature, and particle size. The shrinkage as a function of time exhibits the classical three stages of liquid-phase sintering. The rate-controlling step during the solution-precipitation stage corresponds to a phase-boundary (solid/liquid) reaction leading to dissolution. An activation energy of 52. 8 kcal/mole was obtained for the temperature dependence, and this also suggests a phase-boundary reaction rather than rate control by diffusion in the liquid phase.
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