中文摘要：

以闪速燃烧氮化法合成的β-Si3N4为原料，在1600℃的低氧分压条件下，通过加入金属Al和Y2O3，实现了β-Si3N4的烧结。通过热力学分析以及X射线衍射和扫描电镜能谱分析可知，烧后试样的主要矿物相为氮化硅、赛隆和莫来石，并且金属Al只有在体系中存在液相的条件下才能发挥促烧结的作用。

英文摘要：

using flash combustion nitriding β-Si3N4 as the main material, under the condition of low oxygen atmosphere and 1600 ℃, the sintering of β-Si3N4 by adding aluminum and Y2O3 was realized. The analytic result of thermodynamics, XRD and SEM indicated that the main mineral is silicon nitride, sialon and mullite after sintering, and the effect of aluminum on the sintering only helpful when there is liquid in the system.