YSZ多孔陶瓷的孔隙结构特征及压缩强度研究  

Study on Pore Structure and Compressive Strength of Porous YSZ Ceramics

作　　者：李萌 艾建平 胡丽玲 程丽红 帅亚萍 罗司玲 周泽华 陈智琴 李文魁 LI Meng;AI Jianping;HU Liling;CHENG Lihong;SHUAI Yaping;LUO Siling;ZHOU Zehua;CHEN Zhiqin;LI Wenkui(Jiangxi Key Laboratory of Materials Surface Engineering,School of Materials and Mechanical&Electrical Engineering,Jiangxi Science and Technology Normal University,Nanchang 330038,China)

机构地区：[1]江西科技师范大学材料与机电学院,江西省材料表面工程重点实验室,南昌330038

出　　处：《材料导报》2023年第24期110-116,共7页Materials Reports

基　　金：国家自然科学基金(51862009);江西省自然科学基金(20202BABL204016,20212BAB204019);江西省教育厅科技类重点项目(GJJ190585);江西科技师范大学研究生创新专项资金(YC2021-X04)。

摘　　要：以3%(摩尔分数)Y_(2)O_(3)稳定的ZrO_(2)为原料、异丁烯与马来酸酐共聚物(Isobam-104)为分散剂和凝胶剂、十二烷基三甲基氯化铵(DTAC)为发泡剂,采用球磨发泡法制备出氧化钇稳定的氧化锆(YSZ)多孔陶瓷。研究浆料固含量对YSZ多孔陶瓷制品孔隙结构和压缩强度的影响规律,以及压缩失效机制变化特点。结果表明:在相近发泡率的条件下,固含量在30.5%~33.5%(体积分数)范围内小幅度增加时,所制备的YSZ多孔陶瓷的总孔隙率和平均孔胞尺寸逐渐减小,压缩强度增加;所制备的样品的总孔隙率为79.9%~88.4%,压缩强度为4.7~17.2 MPa,材料的压缩强度与总孔隙率之间的关系同Rice模型相符合;在压缩载荷作用下YSZ多孔陶瓷呈现伪塑性变形,失效破坏的主要形式为剪切破坏。The porous YSZ ceramics were prepared by ball milling foam method using 3%(in mole)Y_(2)O_(3) stabilized ZrO_(2) as a raw material,Isobam-104 as a dispersing and gel agent,dodecyl trimethyl ammonium chloride(DTAC)as a foaming agent and foam stabilizing.The effect of solid content on the microstructure,compressive strength and compressive failure mechanism of the porous YSZ ceramics was investigated.This result shows that the total porosity and the average cell size of as-prepared porous YSZ ceramics gradually decrease and the compressive strength increases when the solid content slightly increases in the range of 30.5vol%—33.5vol%under the similar foaming rate.The total porosity of as-prepared porous YSZ sample was 79.9%—88.4%and the compressive strength was 4.7—17.2 MPa.The relationship between the compressive strength and total porosity was consistent with Rice model.Porous YSZ ceramics exhibit pseudo-plastic deformation under compressive load.And the main failure mode is shear failure.

关 键 词：氧化锆 多孔陶瓷 球磨发泡法 压缩失效机制 

分 类 号：TQ174[化学工程—陶瓷工业]