高耐磨Al_(2)O_(3)-SiO_(2)-ZrO_(2)陶瓷内衬复合钢管制备研究  

Preparation of Al_(2)O_(3)-SiO_(2)-ZrO_(2) Ceramic Lined Composite Steel Pipe with High Wear Resistance

作　　者：杨一 庞玉华[1] 孙琦[1] 何威威 刘东[2] YANG Yi;PANG Yuhua;SUN Qi;HE Weiwei;LIU Dong(School of Metallurgical Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,Shaanxi,China;School of Materials Science and Engineering,Northwestern Polytechnical University,Xi'an 710072,Shaanxi,China)

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055 [2]西北工业大学材料科学与工程学院,陕西西安710072

出　　处：《陶瓷学报》2021年第2期295-300,共6页Journal of Ceramics

基　　金：陕西省重点研发计划(2020GY-253)。

摘　　要：针对因韧性和耐磨性低导致的陶瓷内衬管断裂等现象,为制备综合性能良好的陶瓷内衬复合管,本文采用重力高温自蔓延合成法(SHS)制备Al_(2)O_(3)-SiO_(2)-ZrO_(2)体系陶瓷内衬钢管。结果表明:新陶瓷复层主晶相为α-Al_(2)O_(3),同时,有少量铁铝尖晶石、硅线石及氧化锆存在;当ZrO_(2)添加量为1 wt.%-3wt.%时,陶瓷层晶粒长径比明显增大,增韧性明显提高;钢/陶瓷通过机械啮合及扩散机制复合,界面压剪强度达10.46MPa;当添加2wt.%SiO_(2)及3wt.%ZrO_(2)时,陶瓷复层致密度可提高到92.86%,硬度达1667HV,磨损程度降低至7.0mg/h,断裂韧性高达9.28 MPa·m^(1/2).In view of the fracture of sucker pipe due to the low toughness and low wear resistance,in order to prepare the ceramic-lined composite steel pipe with promising comprehensive performance,a self-propagating high-temperature synthesis(SHS)was explored to develop Al_(2)O_(3)-SiO_(2)-ZrO_(2) system ceramic-lined steel pipe.The main phase of the ceramic layer is α-Al_(2)O_(3),while FeAl_(2)O_(4),Al_(2)SiO_(5) and ZrO_(2) are present as minor phases,when the content of ZrO_(2) is in the range of 1-3 wt.%.Meanwhile,the crystal grain aspect ratio is significantly increased and the toughness is significantly enhanced.Steel/ceramics are composited through mechanical and diffusion mechanisms,with a interface compression shear strength of 10.46 MPa.With 2 wt.%SiO_(2) and 3 wt.%ZrO_(2),the relative density of the ceramics layer can be increased to 92.86%.In this case,the hardness can reach 1667 HV,the degree of wear can be reduced to 7.0 mg/h and the fracture toughness can reach 9.28 MPa·m^(1/2).

关 键 词：SHS 断裂韧性 复合管 陶瓷 摩擦磨损 

分 类 号：TQ174.75[化学工程—陶瓷工业]