CAJ | 학술논문

以黑碳化硅、烧结白刚玉粉(WFA)，二氧化硅微粉(MS)，氧化铝微粉(RA)，铝酸钙水泥(CAC)作为主原料，添加不同比例的硅粉，采用浇注成形、高温氮化的方法制备了碳化硅基耐火材料。研究了不同硅粉含量对试样常规物理性能、物相和显微结构、冷/热态强度及热震稳定性的影响。结果表明：氮化反应进行完全，原位形成的赛隆(Sialon)促进了SiC颗粒间及SiC颗粒与基质间的结合，交叉的网络状结构利于强度的提高。随着热震温度的提高，强度保持率下降，与硅粉加入量无关。
이흑탄화규、소결백강옥분(WFA)，이양화규미분(MS)，양화려미분(RA)，려산개수니(CAC)작위주원료，첨가불동비례적규분，채용요주성형、고온담화적방법제비료탄화규기내화재료。연구료불동규분함량대시양상규물이성능、물상화현미결구、랭/열태강도급열진은정성적영향。결과표명：담화반응진행완전，원위형성적새륭(Sialon)촉진료SiC과립간급SiC과립여기질간적결합，교차적망락상결구리우강도적제고。수착열진온도적제고，강도보지솔하강，여규분가입량무관。
Effects of Si additive on physical properties, microstructure, cold crushing strength (CCS), cold modulus of rupture (CMOR), hot modulus of rupture (HMOR) at 800-1400℃, and thermal shock resistance (TSR) of specimens of SiC based castables added with 5-9%silicon powders and nitridized in nitrogen atmosphere at 1420 ℃ were researched. The main raw materials adopted involve black SiC, white fused alumina (WFA), microsilica (MS), reactive alumina(RA) and calcium aluminate cement (CAC). Chemical compositions and microstructure were analyzed by XRD, SEM and EDAX. The results show that the nitridation reaction was complete. The in-situ formed Sialon was in network state, which enhanced the strength. Residual MOR rate of specimens after thermal shock decreased with the rise of test temperature but with no relevance to the addition amount of Si.