加入不同量Al粉和Si粉的低碳Al_2O_3-C滑板的高温力学性能  

High temperature mechanical properties of Al and Si incorporated low carbon Al_2O_3-C slide plate materials

作　　者：刘新红[1] 钟香崇[1] 

机构地区：[1]郑州大学高温材料研究所,河南郑州450052

出　　处：《耐火材料》2013年第1期6-9,共4页Refractories

基　　金：河南省科技创新杰出青年基金资助项目(124100510019);河南省教育厅自然科学基金资助项目(2011A430024);河南省重点科技攻关项目(112102210095)

摘　　要：以板状刚玉、α-Al2O3微粉、石墨、Al粉、Si粉为原料,固定板状刚玉、α-Al2O3微粉、石墨的加入质量分数分别为85%、5%、2%,加入8%(w)不同比例的Al粉和Si粉(Al、Si质量比分别为0∶8、5∶3、3∶5和8∶0),以酚醛树脂为结合剂,制备了低碳Al2O3-C滑板,并研究了该滑板材料于1 500℃保温3 h埋石墨热处理后的热态抗折强度、应力-应变关系和抗热震性,同时分析了其物相组成和显微结构。结果表明,此低碳Al2O3-C滑板材料具有较高的高温强度和优良的抗热震性:当Al、Si质量比从0∶8变为8∶0时,材料在1 400℃的高温抗折强度从10.4 MPa增至32.4 MPa;在6.5 MPa载荷下1 400℃时的最大变形量从215μm降至90μm;1 100℃风冷热震3次后的抗折强度保持率从80%降至65%。这是由于Al、Si在使用的高温下与C、CO和N2反应生成了非氧化物Al4C3、AlN和SiC,这些非氧化物填充在刚玉骨架结构中起增强、增韧作用,有利于提高低碳Al2O3-C滑板材料的高温力学性能。Naihuo Cailiao. -2013, 47（1）.6Abstract.Low carbon AI203-C slide plate materials were prepared using tabular corundum,a-AI2Q micropowder,graphite,AI powder and Si powder as main starting materials,and phenolic resin as binder. The additions of tabular corundum,a-AI203 micropowder and graphite were fixed at 85% （ mass percent,similar hereinafter） ,5% and 2%, respectively. The total amount of AI powder and Si powder was 8%, and the mass ratios of AI powder to Si powder were O： 8,5： 3,3：5 and 8：0 respectively. Hot modulus of rupture, stress-strain relationship and thermal shock resistance of these materials were investigated after graphiteembedded firing at i 500 ℃ for 3 h. Phase compositions and microstructure were analyzed. The results show that these materials possess improved high temperature strength and good thermal shock resist- ance. When m（AI）/m（Si） varies from 0： to 8：0,HMOR at 1 400 ℃ increases significantly from 10.4 MPaAbstract.Low carbon AI203-C slide plate materials were prepared using tabular corundum,G-AI2Q micropowder,graphite,AI powder and Si powder as main starting materials,and phenolic resin as binder. The additions of tabular corundum,a-AI203 micropowder and graphite were fixed at 85% （ mass percent,similar hereinafter） ,5% and 2%, respectively. The total amount of AI powder and Si powder was 8%, and the mass ratios of AI powder to Si powder were O： 8,5： 3,3：5 and 8： 0 respectively. Hot modulus of rupture, stress-strain relationship and thermal shock resistance of these materials were investigated after graphiteembedded firing at 1500℃ for 3 h. Phase compositions and microstructure were analyzed. The results show that these materials possess improved high temperature strength and good thermal shock resistance. When m（AI）/m（Si） varies from 0：8 to 8：0,HMOR at 1400 ℃ increases significantly from 10.4 MPa to 32.4 MPa;the maximum strain under 6.5 MPa stress at 1 400℃decreases from 215 μm to 90 μm;residual strength ratio after 3 thermal

关 键 词：低碳Al2O3-C滑板 高温力学性能 Al粉 SI粉 氧化物-非氧化物复合材料 

分 类 号：TQ175.65[化学工程—硅酸盐工业]