Ceramic material processing by electrical discharge in electrolyte
Ceramic material processing by electrical discharge in electrolyte
复制标题
DOI：
10.1007/bf01148788
复制
发表时间：
1989-03
影响因子：
4.5
通讯作者：
H. Tokura;I. Kondoh;Masanori Yoshikswa
中科院分区：
文献类型：
--
作者：
H. Tokura;I. Kondoh;Masanori Yoshikswa
新型陶瓷材料作为机器部件受到了极大的关注，但它们很难加工。因此，提出了一种电火花加工与磨削加工相结合的复合加工方法。在这项研究中，为了检查这种混合处理的可能性，四种陶瓷的放电加工进行了针电极。陶瓷材料为氧化铝和三种添加氧化铝（Al2O3）、氧化镁（MSN）、氧化钇（Y2O3）和氧化铝（Y2O3）的氮化硅系列。结果表明，在任何陶瓷上都能形成凹坑，凹坑深度因陶瓷材料而异。氧化物、氧化铝、钇和锰氧化物的去除率依次降低，且与其力学性能无关。在氮化硅系列的情况下，去除率取决于它们的烧结添加剂，并且施加的电压越高，去除的体积越大。当针电极为负时，获得了高的去除率和低的电极损耗。陶瓷材料主要通过在放电过程中在高温电解液中蚀刻晶界来去除。
New ceramic materials receive a great deal of attention as machine components, but they are hard to work. So a hybrid processing which combines electrical discharge processing with grinding is proposed. In this study, in order to examine the possibility of this hybrid processing, the electrical discharge processing on four kinds of ceramics was carried out with a needle electrode. The ceramic materials were alumina and three kinds of silicon nitride series to which are added alumina (ASN), magnesia (MSN), yttria and alumina (YASN). The results obtained showed that a pit can be formed on any ceramic and the pit depth apparently varies with the ceramic material. The removal rates of ASN, alumina, YASN and MSN become low in turn, and are independent of their mechanical properties. In the case of the silicon nitride series, the removal rates depended on their sintering additives, and the higher the applied voltage, the greater was the volume removed. High removal rate and low electrode loss are obtained when the needle electrode is negative. The ceramic materials are mainly removed by etching the grain boundary in a high-temperature electrolyte during the discharging process.