研究了在β10－Sialon（Si5．23Al0.77O0．77N7，23）中加入7．26Wt％Nd-黄长石固溶体（Nd2Si2AlO4N3）组份的反应过程和致密化行为．烧结过程中，稀土元素先进入α－Sialon；随温度的升高，稀土元素存在于晶界玻璃相中，并在退火过程中以黄长石相析出．对热压及经退火处理的样品，研究了其在1000～1400℃的氧化行为．1000℃氧化时，作为晶界相的黄长石固溶体并不会导致样品开裂．但在更高温度氧化时，氧化后的表面存在择优取向的A－Nd2Si2O7晶粒，且由于Nd离子的表面偏析使表面氧化层软化而形成气泡． The reaction process and densification behavior of 7.26Wt% Nd-yellow feldspar solid solution (Nd2Si2AlO4N3) were studied in β10-Sialon (Si5.23Al0.77O0.77N7,23). During the sintering process, the rare earth elements first enter α-Sialon. With the increase of temperature, the rare earth elements exist in the grain boundary glass phase and precipitated in the process of annealing. For hot pressing and annealed samples, the oxidation behavior at 1000 ~ 1400 ℃ was studied. When oxidized at 1000 ° C, the yellow feldspar solid solution as the grain boundary phase did not cause cracking of the sample. However, when oxidized at a higher temperature, the preferentially oriented A-Nd2Si2O7 grains exist on the oxidized surface, and the surface oxide layer softens to form bubbles due to the surface segregation of Nd ions.