一、前言难熔化合物自扩展高温合成方法(即自燃烧法)的原理是利用某些难熔金属与硼、碳、氮、硅等元素在一定条件下发生强烈放热反应的特点,不引入外热源,依靠元素自身反应释放的热能,独立将混合料转变为化合 I. INTRODUCTION The principle of self-expanding high-temperature synthesis of refractory compounds (that is, self-combustion method) is to use some refractory metals and boron, carbon, nitrogen, silicon and other elements under the conditions of a strong exothermic reaction does not occur External heat source, relying on elements of their own reaction to the release of heat, the mixture will be transformed into compound