Densification and Crystallization in Fe–Based Bulk Amorphous Alloy Spark Plasma Sintered in the Supercooled Liquid Region

Advanced Engineering Materials - Tập 19 Số 8 - 2017
Tanaji Paul1, Ashish Kumar Singh1, Sandip P. Harimkar1
1School of Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater OK 74078, United States

Tóm tắt

Spark plasma sintering of Fe48Cr15Mo14Y2C15B6 bulk amorphous alloy at a range of temperatures in the supercooled liquid region (SLR) and above yielded near fully dense compacts. Upon sintering in the temperature range of 570–630 °C in SLR, large increments in density are observed due to enhanced sintering resulting from drastic reduction in the viscosity of the alloy. Above 630 °C, the absence of sufficient driving force for sintering and stiffening of the amorphous matrix from partial crystallization leads to sluggish densification. Analysis of the temperature profile in the sample and the die reveals that the temperature at the center of the sample is higher than that at the inner wall of the die as recorded by the thermocouple and the difference between the two is estimated to be between 31 and 53 °C.

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Advanced Engineering Materials

Tập 19 Số 8

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