【摘要】 用ＴＥＭ研究了Ｎｉ４０Ｔｉ５０Ｃｕ１０粉末在球磨过程中，颗粒尺寸及微观结构的变化。球磨６０小时后，得到非晶相粉末。用ＸＲＤ研究了球磨工艺条件对衍射峰相对强度和晶格常数的影响，结果表明，提高球磨转速和球料比，加快颗粒细化和合金化过程，合金化过程中，Ｃｕ和Ｎｉ原子向Ｔｉ中扩散速率较快，这与Ｔｉ的原子半径较大有关。ＤＳＣ测定了晶化转变开始温度为５１１℃。更多还原

【Abstract】 The changes in crystallite size and microstructure of Ni 40 Ti 50 Cu [HT7”SS] 10 powders in the process of mechanical alloying have been studied by SEM and TEM. The amorphous phase forms in 60h of milling. The effects of milling conditions on the diffraction intensity and the lattice parameter have been characterized by XRD. The increase in the ball-to-powder weight ratio(BPR) and the rotational velocity resulted in a higher rate of decrease incrystallite size and an accelerated alloying process. The crystallization temperature measured for amorphous phase was 511℃.更多还原