材料界从始至终就经历着各种浪潮的冲击,这反映在从ABS塑料和PBZT纤维到TiA1金属间化合物和ZrO_2粉末及介于金属与非金属之间的多种材料,试图跟上这种迅猛剧变的形势并非易事。过去选择“完全合适”的材料满足严格的应用要求是一项困难的工作。如今,这种选择似乎是不可能了。实际上在材料领域,全力以赴地工作只能勉强跟上形势。例如,合金的概念过去只是指金属,现在它也包括塑料。过去金属问化合物是金属材料中不希望出现的“杂 The material community has undergone various waves of impact from start to finish, reflected in the various materials ranging from ABS plastic and PBZT fibers to TiAl intermetallics and ZrO_2 powders, and between metallic and non-metallic, in an attempt to keep up with this The situation of rapid change is not easy. In the past, choosing “perfectly suitable” materials to meet the rigorous application requirements was a difficult task. This choice seems impossible nowadays. In fact, in the field of materials, all-out efforts can only barely keep up with the situation. For example, the concept of alloy used to refer only to metal, and now it also includes plastic. Metal-based compounds used to be metal materials that do not want to appear "miscellaneous