添加剂对煤粉喷枪SHS陶瓷内衬组织和性能的影响  

Effects of Additives on Structure and Properties of SHS Lined Ceramics for Coal-Spurting Gun

作　　者：赵忠民[1] 王建江[2] 叶明惠[2] 林心康 张龙[2] 刘广生[2] 

机构地区：[1]石家庄军械工程学院金工教研室,石家庄050003 [2]军械工程学院

出　　处：《材料科学与工艺》1999年第1期67-71,共5页Materials Science and Technology

基　　金：军械工程学院科研基金!YJJXM 98006

摘　　要：采用重力分离SHS法制备了陶瓷内衬煤粉喷枪枪管．试验得出，陶瓷层主要由构成枝晶的α-Al2O3基体相和分布于其间的Feo·Al2O3尖晶相所组成，SiO2主要以石英相结构存在于枝晶晶界上；在反应物料中加入适量的SiO2和Cr2O3均可有效地提高内衬陶瓷层的相对密度；SiO2将使陶瓷层的硬度和复合钢管的抗压剪强度降低，Cr2O3却使二者均有所回升；在内衬陶瓷层中分布着径向裂纹和网状裂纹，加入SiO2将减少裂纹密度，Cr2O3却使裂纹密度增加.Ceramic-lined coal-spurting gun pipes have been produced by gravitational separation SHS method. It is found that Ceramic layers are mainly composed of α-Al2O3 matrix phases assuming dendritic crystals and FeO·Al2O3 spinel phases distributed at dendritic boundary area,Sio2 in ceramics exists in the form of quartz phases at dendritic boundary. Adding SiO2 and CtO3 in thermit mixtures can effectively increase relative density of ceramic layers. SiO2 will reduce ceramic hardness and compressive shear strength of pipes, whereas CrO3 will increase two sides in certain degrees. Radial cracks and net cracks are observed on creamic layers. Adding SiO2 reduces cracks density. CrO3 increases crack desity on ceramic layers.

关 键 词：组织 性能 重力分离SHS法 煤粉喷枪枪管 添加剂 陶瓷内衬复合管 陶瓷层 钢管 复合材料 

分 类 号：TB333[一般工业技术—材料科学与工程] TG174.453[金属学及工艺—金属表面处理]