低溫球磨裝置

1、低溫球磨裝置一、設(shè)備簡介自制非標(biāo)設(shè)備，用于多種類型材料的粉碎或機械合金化。二、 主要性能指標(biāo)及具體參數(shù)1. 容積： 30 L。2. 工作溫度： +30 -160。3. 工作真空度： 100 Pa。4. 變頻調(diào)速，輸出轉(zhuǎn)速 n 200 r/min。5. 低溫球磨時可在線檢測球磨溫度，自動記錄球磨機工作時的各項性能參數(shù)（如轉(zhuǎn)速、扭矩、溫度等） ，并以電子文件的形式保存。Cryogenic reaction attritor milling, or cryomilling, is a high energy ball milling process, by which elemental and p

2、re-alloyed powders are milled in cryogenic media, e.g. liquid nitrogen, liquid argon, etc., to form a slurry. So far, most of the cryomilling has been carried out in liquid nitrogen. It has been suggested that the presence of liquid nitrogen during milling prevents problems induced by heating during

3、 milling and leads more rapidly to a smaller crystallite size.Advantages of Using the Attritor:Fast and efficient grindingNumerous optionsFlexibilityRepeatabilityEasy operationLow maintenanceCommon Applicatons for the Attritor:Metal powdersMetal oxidesGlassesMinerals, coalChemicalsFood products三、 設(shè)備

4、照片、現(xiàn)場使用照片圖 1 低溫球磨裝置四、 教學(xué)和科研工作的成果圖 2 120 K 低溫球磨 10 h 后納米 Al-Zn-Mg-Cu 合金粉的 TEM 像Fig.2 TEM photograph of Al-Zn-Mg-Cu alloy powders versus milling time at 120K for 10 h110100 ( 111)m90n80(ez70isn60ia50rG40300246810Cryomilling time (h)圖 3 Al-Zn-Mg-Cu 合金粉平均晶粒尺寸隨球磨時間的變化情況Fig.3 The grain size of Al-Zn-Mg-Cu

5、 alloy powders versus milling time at 120K in aliquid nitrogen slurry110100)9080m100 nm70n100 nm(e60100 nmz50isn40i30arG2010100 nm02003004005006007008009001000100T (K)圖 4 加熱溫度對 Al-Zn-Mg-Cu 合金粉平均晶粒尺寸的影響Fig.4 Effect of heating temperature on the mean size of cryomilled Al-Zn-Mg-Cualloy powders圖 4 顯示，Al-Zn-Mg-Cu 合金粉末在小于 0.78 Tm（ Tm 為熔點）溫度熱處理，晶粒長大速度緩慢，即納米晶 Al-Zn-Mg-Cu 合