Abstract
Effect of milling mode (the ratio of milling period to pause one) on amorphization of mixed Ni33Zr67 powders by mechanical alloying(MA) was examined using high-speed vibratory ball mill. Three modes were determined by measuring temperatures on inner wall of vessel during MA with Chromel-Constantan(CRC) thermocouple, that is, mode A(the maximum temperature reached at 370 K), mode B(the maximum one 423 K) and continuity(continuous milling. 480 K after 150 ks of milling). The amorphization rate of the specimen by the mode A milling was slower than that by the continuous one, judging from the results of X-ray diffractometry and differential scanning calorimetry. Also, the thermal stability of the amorphous phase obtained was higher in this order: continuity, mode B and mode A.
