The adding of process - control agent can effectively keep the powder from sticking to the milling ball and the inner wall of containers . the increase of rotating velocity and the ratio of ball to powder can accelerate the phase transformation and thus shorten the alloying time 加入過程控制劑,可以有效地防止粉末粘覆磨球和罐內(nèi)壁;球磨轉(zhuǎn)速的提高和球粉比的增加,都會加速相轉(zhuǎn)變過程,從而縮短合金化時(shí)間。
In order to obtain good ohm contact , the experimental project is designed by adopting kelvin photochart . the sheetary contact resistances of the samples are measured under ali kinds of condition , such as different substrate growing temperature , different alloy temperature , different alloy time and different metal contact 為得到良好的歐姆接觸,利用kelvin方法設(shè)計(jì)了試驗(yàn)方案,測試樣品在不同的襯底生長溫度、不同合金溫度、不同合金時(shí)間、不同金屬的比接觸電阻。