碳化硅粉体湿法研磨中机械力化学效应研究  

Mechano-Chemical Effect of SiC Powder in Wet Grinding

作　　者：马丽莉[1] 铁生年[1] 汪长安[1,2] 

机构地区：[1]青海大学,青海西宁810016 [2]清华大学,北京100084

出　　处：《稀有金属材料与工程》2013年第S1期388-391,共4页Rare Metal Materials and Engineering

摘　　要：研究了碳化硅粉体在湿法研磨过程中的机械力化学效应。通过粒度分析仪、X射线衍射仪(XRD)、扫描电镜(SEM)等手段对不同累积研磨时间下所获碳化硅粉体的特性进行分析。结果表明:随着研磨时间的延长,碳化硅粉体粒度逐渐减小,粉体颗粒均匀化、规则化,粉体晶粒尺寸不断减小,显微应变逐渐增加,晶体结构不断无定形化。研磨初期机械能致力于碳化硅颗粒的粉碎,后期则转为克服由机械力活化引起的粉体团聚。Mechano-chemical effect of SiC powder in wet grinding was studied. The characteristics of powder samples with different cumulative grinding time were analyzed by means of particle size analyzer, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results indicate that the particle size of SiC powder gradually decreases with more uniform particle size distribution, and the grain size decreases accompanied by an increase of micro-strain with the extension of grinding time. The mechano-chemical effect causes the crystal structure amorphization of the SiC powder. Mechanical energy is used to crush the SiC particles in the initial stage of grinding and prevent the SiC particles from agglomeration caused by the activation of mechanical forces in the later period.

关 键 词：湿法研磨 碳化硅粉体 机械力化学效应 

分 类 号：TB383.1[一般工业技术—材料科学与工程] O613.72[理学—无机化学]