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1、畢業(yè)設(shè)計（論文）____________________________________________________________________________________________2323畢業(yè)設(shè)計（論文）____________________________________________________________________________________________摘要本研究以碳化硅為主料，以羧甲基纖維素鈉(CMC)為造孔劑，分別用SiO2-Y2O3-Al2O3和SiO2-高嶺土作為助燒劑，制備了多孔碳化硅陶瓷，研究了
2、不同SiO2-Y2O3-Al2O3和SiO2-高嶺土含量對多孔碳化硅材料結(jié)構(gòu)和力學(xué)性能的影響。SiO2-Y2O3-Al2O3和SiO2-高嶺土的含量影響碳化硅多孔陶瓷的氣孔率、硬度及其抗折強度。本次實驗采用了阿基米德法測量多孔陶瓷的氣孔率，采用洛氏硬度儀測量了其硬度，采用萬能材料試驗機測量了其抗折強度。實驗結(jié)果表明：以SiO2-Y2O3-Al2O3為助燒劑，且SiO2-Y2O3-Al2O3含量為20%時，所制備的碳化硅多孔陶瓷性能較以SiO2-高嶺土為助燒劑時優(yōu)越。以SiO2-Y2O3-Al2O3為助燒劑，在1500℃可以制備出性能較好的多孔碳化硅陶瓷。當(dāng)S
3、iO2-Y2O3-Al2O3含量為20％時，所制備的碳化硅多孔陶瓷兼具有較大的氣孔率和優(yōu)良的力學(xué)性能，其開口氣孔率為23.73%，硬度及抗折強度分別為62和15.47MPa，從斷口可以看出氣孔較多且分布均勻。關(guān)鍵詞：碳化硅SiO2-Y2O3-Al2O3SiO2-高嶺土多孔陶瓷2323畢業(yè)設(shè)計（論文）____________________________________________________________________________________________TitleEffectofSinteringAidsonthePropertie
4、sofPorousSiCCeramicsAbstractThisstudyusessiliconcarbideasmainmaterial,withcarboxymethylcellulose(CMC)asthepore-formingagent,respectively,withSiO2-Y2O3-Al2O3andSiO2-kaolinasthesinteringagent,preparationofporoussiliconcarbideceramics,studieddifferentSiO2-Y2O3-Al2O3andSiO2-kaolinconte
5、ntonthestructureandmechanicalpropertiesofporoussiliconcarbidematerialeffect.SiO2-Y2O3-Al2O3andSiO2-kaolincontentinfluencestomatalporousSiCceramicsrate,hardnessandbendingstrength.Inthisexperiment,theporosityofporousceramicsbymeasuringArchimedesrate,itshardnesswasmeasuredbyRockwellha
6、rdnesstester,thebendingstrengthwasmeasuredusingauniversaltestingmachine.Theexperimentalresultsshowthat:withSiO2-Y2O3-Al2O3assinteringaid,andthecontentofSiO2-Y2O3-Al2O3was20%,theperformancesofporousSiCceramicspreparedwithkaolinthanSiO2-kaolinassinteringaidsadvantages.TakingSiO2-Y2O3
7、-Al2O3assinteringaids,at1500℃canporoussiliconcarbideceramicswithgoodpropertieswasprepared.WhenthecontentofSiO2-Y2O3-Al2O3is20%,thepreparationofporousSiCceramicspreparedwithmechanicalpropertiesofhighporosityandexcellent,theopenporosityis23.73%,hardnessandbendingstrengthis62and15.47M
8、Parespectively,atthesameti
