Use Electron Micro Technology to Study Microcosmic Structure and Mechanical Properties of Si3N4/Nanon SiC Multiphase Ceramics
The microstructure characteristics of Si3N4/nanometer SiC multiphase ceramics material was studied by electronic microscopy, and the different of the nanometer multiphase and the single-phase Si3N4 ceramics microstructure was analyzed. The relations of the multiphase ceramics material mechanical properties and the microstructure were discussed. The nanometer grain in material restrain Si3N4 crystallinity, improve the mechanical properties of material. Nanometer multiphase ceramics is a new kind of ceramics material which developed in several years, in which Nanometer crystalline grain is smaller than 500nm, because of its small crystalline grain and interface out of order, it has much better feature than that of traditional ceramics materials, it is one of directions on which ceramics material develop in future. The study shows, the temperature indoor strength and toughness is higher 2-3 times than single set material in nanometer multiphase ceramics, at temperature indoors, toughness, strength and anti-creep etc improve a lot. Use high resolving power analyzing technology and electron diffraction analyzing technology of transmission electron microscope can distinguish crystal size, appearance distribution form, dislocation and crystal boundary phase of different material in one sample, in the order to study deeply the relation between microcosmic structure feature of the material and mechanical properties and valuable information to improve material.
Q. T. Li, "Use Electron Micro Technology to Study Microcosmic Structure and Mechanical Properties of Si3N4/Nanon SiC Multiphase Ceramics", Advanced Materials Research, Vols. 588-589, pp. 108-110, 2012