反应烧结指将原料成型体在一定温度下通过固相，液相和气相相互间发生化学反应，同时进行致密化和规定组分的合成，得到预定的烧结体的过程。反应烧结仅局限于少量几个体系，例如氮化硅、氧氮化硅、碳化硅等。
Reaction sintering refers to the chemical reaction between solid and liquid phase and gas phase at a certain temperature at a certain temperature, at the same time the densification and the synthesis of prescribed components are carried out, and the process of the predetermined sintering body is obtained. Reaction sintering is limited to a few systems, such as silicon nitride, silicon oxynitride and silicon carbide.
优缺点
Advantages and disadvantages
反应烧结的优点是不需添加额外的添加物，因此高温下材料的强度不会明显降低；产品的外形和尺寸基本不变，可以制得形状复杂尺寸精确的制品；要把两个零件焊接在一起，只需将其连接在一起进行氮化即可；同时工艺简单、经济，适合大批量生产。
The advantage of the reaction sintering is that no extra additives are needed, so the strength of the material will not be reduced obviously at high temperature; the shape and size of the product are basically unchanged, and the exact shape of the shape can be made. The two parts are welded together in a single process of nitriding; at the same time, the process is simple. Economy, suitable for mass production.
缺点是烧结坯密度低，例如反应烧结的氮化硅密度约2.4g/cm3，气压烧结氮化硅密度约3.2g/cm3，材料力学性能不高。
The disadvantage is that the density of sintered billets is low, for example, the density of sinter silicon nitride is about 2.4g/cm3, and the density of air sintered silicon nitride is about 3.2g/cm3, and the mechanical properties of materials are not high.