纳米SiC粉中的氧含量对Al_2O_3陶瓷无压烧结的影响  

Influence of oxygen content in SiC nano powder on Al_2O_3/SiC nanocomposite ceramics

作　　者：韩亚苓[1] 葛景岩[1] 王玉海 

机构地区：[1]沈阳工业大学 材料科学与工程学院,辽宁沈阳110023 [2]烟台百思特炉管厂

出　　处：《沈阳工业大学学报》2001年第3期185-188,共4页Journal of Shenyang University of Technology

摘　　要：讨论了纳米 SiC中的氧含量对 Al2O3/ SiC纳米复相陶瓷性能的影响 .发 现当氧含量偏高时，烧结体难以致密化，同时在组织中出现大尺寸气孔 .实验证明，氧含量 较低的纳米β SiC可以使烧结体密度和强度得到极大提高；而氧含量偏高的 Si/C/N非晶 复合粉，提高性能的作用甚微 .其根本原因就是，粉体中的氧与硅形成蒸气，从而使烧结体 中出现气孔 .Influence of oxygen content in nano SiC powder on the properties o f Al2O3/SiC nano composite ceramics has been investigated. It has been found tha t the ceramics can not be sintered to a very high density and large size more pore will appear in the sintering body as the oxygen content keep a high value. The experimental results show thatβ－ SiC nano powder with a low oxygen content can raise the relative density of the sintered body to 98.82％ , while Si/C/N a morphous compound powder with a high oxygen content can not do it. One of the k ey causes is that the vapor resulting from oxygen and silicon makes much pore ap peared in cermics.

关 键 词：氧化铝 碳化硅 纳米复相陶瓷 β-SiC纳米粉 无压烧结 硅碳氮非晶复合粉 

分 类 号：TB383[一般工业技术—材料科学与工程] TQ174.758[化学工程—陶瓷工业]