中文摘要：

为了改善低碳Al2O3-C滑板的高温力学性能，在质量分数65％的电熔白刚玉颗粒、25％的白刚玉细粉、6％活性α-Al2O3粉、4％的石墨＋炭黑、外加4％酚醛树脂的滑板配料中，分别以3％（W）的灿粉或Si粉或3％（w）灿粉＋3％（w）Si粉等量替代白刚玉细粉，混匀后在150MPa下压制成140mm×25mm×25mm的试样，经200℃24h干燥，1400℃埋焦炭处理3h后，检测其高温抗折强度和抗热震性，并分析物相组成及显微结构。结果表明：单加舢粉的试样高温抗折强度高于单加Si粉的，但前者热震后残余抗折强度比后者低；与单加Al粉或Si粉的试样相比，同时加灿粉和Si粉的试样具有更高的高温抗折强度和更优的抗热震性。力学性能的变化与试样中原位生成的非氧化物相密切相关：在单加舢粉或Si粉的试样中分别有棒状A1N晶须或纤维状SiC晶须生成；而同时加Al粉和Si粉的试样中除了有AlN晶须和SiC晶须生成外，还原位生成了六角板状的SiAlON相，并相互交织在一起。

英文摘要：

The basic formulation of Al2O3-C slide plates was 65% （in mass,similar hereinafter） white fused corun- dum particles,25% white fused corundum fines,6% active α-Al2O3 powder,4% carbon black and flake graphite, and additional 4% phenolic resin. Based on this formulation,3% AI powder,3% Si powder,and 3% AI ＋ 3% Si powder were used to substitute equivalent white corundum fines to improve the hot mechanical properties of Al2O3-C slide plates. The specimens with size of 140 mm ×25 mm ×25 mm were pressed at 150 MPa,dried at 200 ℃ for 24 h,and hot treated at 1 400 ℃ for 3 h in carbon embedded condition. Then hot modulus of rupture and thermal shock resistance of the specimens were tested and the phase compositions and microstructure were an- alyzed. The results show that specimen with 3% AI powders has higher hot modulus of rupture but lower residual modulus of rupture after thermal shock than the specimen with 3% Si powder;the specimen with 3% AI and 3% Si powder exhibits both higher hot modulus of rupture and better thermal shock resistance compared with the specimens with only AI or Si powders; the change of mechanical property is closely related with the in-situ formed nonoxides.AIN in the form of bars is formed in specimens with AI powder;fibrous SiC whiskers are formed in specimens with Si powder;in the specimens with both AI and Si powders,besides AIN and SiC whisk- ers,hexagonal tabular SiAION is in-situ synthesized which interlocks with each other.