【作者】
王昕；
孙康宁；
李静；
于薛刚；
尹衍升；
杨连喜；
【Author】
WANG Xin 1,2 , SUN Kang ning 1,2 , LI Jing 2, YU Xue gang 2, YIN Yan sheng 1,2 , YANG Lian xi (1. Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University, Jinan 250061, China; 2. Key Laboratory of Engineering Ceramics, Shandong Province, Shandong University, Jinan 250061, China)
【机构】
Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University,Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University,Key Laboratory of Engineering Ceramics, Shandong Province, Shandong University,Key Laboratory of Engineering Ceramics, Shandong Province, Shandong University,Key Laboratory of Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University Ji’nan 250061, China；
Key Laboratory of Engineering Ceramics, Shandong Province, Shandong University, Jinan 250061, China, Ji’nan 250061, China；
Key Laboratory of Engineering Ceramics, Shandong Province, Shandong University, Jinan 250061, China, Ji’nan 250061, China, Ji’nan 250061, China, Ji’nan 250061, China；
Key Laboratory of Engineering Ceramics, Shandong Province, Shandong University, Jinan 250061, China；
【Abstract】 High temperature corrosion behavior of Si 3N 4 8%Al 2O 3(volume fraction) composite ceramics in sulfur oxygen environments was studied. At 1 150 ℃ and 1 350 ℃,the corrosion processes follow parabolic law with parabolic rate constants ( K p) of 1.45×10 -9 g 2·cm -4 ·s -1 and 7.92×10 -9 g 2·cm -4 ·s -1 , respectively. The corrosion mechanisms are different at different temperatures. At 1 150 ℃, the corrosion of the material is due to the destruction of SiO 2 layer caused by sulfur and the active oxidation corrosion. At 1 350 ℃ , the diffusion of additives and impurity elements to grain boundaries and outward to surface layers lead to the formation, growth and break of bubbles, which accelerates the corrosion rate of the Si 3N 4 ceramics.更多还原
【基金】 Project (Y2 0 0 1F0 1)supportedbytheNaturalScienceFoundationofShandongProvince;China
