一、前言陶瓷的特征是比金属硬、摩擦系数小、耐磨性好,但质地很脆,加工困难。近来有一种用于制造轴承的陶瓷,因其原料的选择、毛坯的制造和加工等整个过程都受到严格控制,所以,它的物理性能及工艺性都比一般的陶瓷优良,称为精制陶瓷。为了在机械零件中有效地利用这些优良的特性,所以, First, the foreword The characteristics of ceramics than the metal hard, small friction coefficient, good wear resistance, but the texture is very brittle, processing difficulties. Recently, there is a kind of ceramic used for making bearings. Because of its raw material selection, the whole process of manufacturing and processing of blank are strictly controlled, its physical properties and processability are superior to those of ordinary ceramics and are called refined ceramics. In order to effectively utilize these excellent features in mechanical parts,