SiC气凝胶材料表面ZrB_(2)陶瓷涂层的制备及抗氧化性能研究  

Preparation and oxidation resistance of ZrB_(2)ceramic coatings on surface of SiC aerogel

作　　者：马昭蕊 孙小飞[2] 刘广华 赵世贤[2] 丛鹤地 王刚[2] Ma Zhaorui;Sun Xiaofei;Liu Guanghua;Zhao Shixian;Cong Hedi;Wang Gang(School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450000,Hennan,China;不详)

机构地区：[1]郑州大学材料学院,河南郑州450000 [2]中钢集团洛阳耐火材料研究院有限公司先进耐火材料全国重点实验室,河南洛阳471039 [3]中国联合重型燃气轮机技术有限公司,北京100045

出　　处：《耐火材料》2025年第2期144-148,共5页Refractories

基　　金：河南省重点研发项目(221111231100)。

摘　　要：为提高SiC气凝胶材料的高温抗氧化性能,将ZrB_(2)粉末与硅溶胶以7∶3的质量比配制陶瓷浆料,采用浸蘸法涂覆在SiC气凝胶表面,400℃保温2 h得到了ZrB_(2)抗氧化陶瓷涂层,对制备得到的涂层材料分别在600、800、1000和1200℃保温2 h热处理,研究了试样的耐压强度和抗氧化性能。结果表明:ZrB_(2)涂层可为SiC气凝胶提供有效的抗氧化防护。氧化初期形成连续致密的B_(2)O_(3)玻璃液相层;随热处理温度升高,两种氧化产物SiO_(2)与ZrO_(2)反应生成的ZrSiO_(4)可封填涂层中B_(2)O_(3)挥发产生的孔洞,有效提高材料抗氧化性能。含ZrB_(2)涂层的SiC气凝胶材料的耐压强度随热处理温度升高而增大,在1200℃时最大,为0.82 MPa,此时的抗氧化性最好。In order to improve the high-temperature oxidation resistance of SiC aerogel materials,a ceramic slurry was prepared by mixing ZrB_(2)powder and silica sol at a mass ratio of 7∶3.The slurry was then coated on the surface of the SiC aerogel using the dip-coating method.After heat treatment at 400℃for 2 h,an anti-oxidation ZrB_(2)ceramic coating was obtained.The prepared coating materials were heat-treated at 600,800,1000 and 1200℃for 2 h,respectively,and the compressive strength and oxidation resistance were investigated.The results show that the ZrB_(2)coating can provide effective anti-oxidation protection for the SiC aerogel.In the initial stage of oxidation,a continuous and dense B_(2)O_(3)glassy liquid phase layer is formed.With the temperature rising,ZrSiO_(4),which is generated by the reaction between the two oxidation products SiO_(2)and ZrO_(2),can fill the pores formed by the volatilization of B_(2)O_(3)in the coating,effectively improving the oxidation resistance of the material.The compressive strength of the ZrB_(2)/SiC aerogel composite increases with the temperature rising,reaching a maximum of 0.82 MPa at 1200℃and performing the best oxidation resistance.

关 键 词：ZrB_(2)陶瓷涂层 SiC气凝胶 料浆浸蘸法 耐压强度 抗氧化性能 

分 类 号：TB332[一般工业技术—材料科学与工程]