It is indicated that mechanical milling dramatically enhances the activity of the powder and thus making the solid state diffusion between the two elements much easier . on the other hand , green samples made of deep milled powders are hard to sinter to their densification 實驗結(jié)果表明,機械研磨由于顯著提高粉體活性而促進ni , ti元素間的擴散相變,研磨程度越深,對固態(tài)反應(yīng)相變的促進作用越大。