液态成型原理（Liquid forming principle）.doc

液态成型原理（Liquid forming principle） Solid phase sintering: the process in which solid powders change into hard, compact sintered bodies by mass transfer between material and pore at appropriate temperatures, pressures, atmospheres, and time. Liquid sintering: sintering process with liquid phase. Metal bond: bond force produced by electrostatic interaction between free electrons and nuclei. Ionic bond metal atoms their valence electron donating non metal atoms, is to become positively charged ions, and non metals are valence electrons to become negative after negatively charged ions, such as positive and negative ions by electrostatic attraction between them together. Covalent bond: chemical bond formed by the sharing of electron pairs between two or more electronegative atoms. Hydrogen bond: a bond that is produced by the simultaneous combination of hydrogen atoms with two electronegative atoms with smaller atomic radii (O, F, N, etc.). Frank: interstitial vacancy defect defect Schottky defect: austenitic and negative ion vacancies on the gamma iron inner solution of carbon and other elements (or) crystal structure, solid solution fcc. Bravais: in addition to considering the shape of crystal lattice, which is considered by the position of the lattice points. Incomplete dislocation: the PATS vector is not equal to the integer of the lattice vector, and the dislocation is called incomplete dislocation. The glass transition temperature of supercooled liquid: as the temperature continues to drop, the supercooled liquid viscosity increases rapidly, the mutual movement between atoms becomes more difficult, so when the temperature falls below a critical temperature, which is solidified into a glass. This critical temperature is called the glass transition temperature Tg. Surface energy: the surface atoms are in an inhomogeneous force field, so their energy is greatly increased, and the higher energy is called surface free energy (or surface energy). Semicoherent interface: if