摘要
凝胶注模成型优于传统陶瓷成型技术的一个显著特点是坯体具有足够的机加工强度,此强度的大小与单体聚合所成聚合物的聚合度和交联度有很大关系。本实验从自由基聚合角度分析了丙烯酰胺体系注凝成型氧化铝过程中,有机单体、交联剂、引发剂、催化剂、固相含量以及添加剂聚乙二醇的加入量等固化过程的内部因素对坯体强度的影响。结果表明:在注凝成型体系中,这些物质的相对含量对所成生坯的强度有很大影响,在最佳工艺条件下,氧化铝生坯强度可达到32MPa,完全可以满足机加工要求。
Comparing with traditional ceramic forming method, gelcasting sample has a higher green strength, which is suitable for machining. The green strength is dependent on the polymerization and cross linking degree of the added monomer. In this paper, the influences of the content of monomer, crossing linker, initiator, catalyst, solid loading and other addition agent on the Al2O3 green strength by gelcasting were researched. The result show that their contents had great effects on the green strength. In the optimum condition, a defectfree dried green body with a bend strength of 32MPa can be obtained by geleasting technique, which can meet the requirement of machining.
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2007年第2期262-264,共3页
Journal of Materials Science and Engineering
