烧结陶瓷(如SiC)的强度已有了明显改善,可约低于理论强度两个数量级。但同样生产出的实验样品的断裂强度差异有时竟达35％,这些差异被认为是由孔洞、夹杂物、团块以及异常的大晶粒造成的。这些引起过早断裂的缺陷是在陶瓷生产过程中引起或形成的。 陶瓷是脆性材料,对极微小的显微组织变化也特别敏感。直接观察已经表明上述各 The strength of sintered ceramics (such as SiC) has been significantly improved, which can be about two orders of magnitude lower than the theoretical strength. However, the difference in breaking strength was also sometimes found in 35% of the experimental samples produced. These differences were considered to be caused by voids, inclusions, clumps, and abnormally large grains. These defects that cause premature rupture are caused or formed during the ceramic production. Ceramics are brittle materials that are also particularly sensitive to microscopic microstructure changes. Direct observation has shown above each