包覆法制备高性能3YSZ粉体的研究
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摘要
采用固相均匀包覆法制备3 mol%氧化钇稳定氧化锆陶瓷(3YSZ)包覆型粉体,高温烧结得到相应的陶瓷试样.通过扫描电镜(SEM)对颗粒包覆情况进行表征,并对陶瓷材料的力学性能进行了检测和分析.实验结果表明:固相均匀包覆法有利于两种氧化物的均匀混合;氧化锆和氧化钇的粒径比例为16∶1时,包覆结构较清晰,烧结后的陶瓷试样相对密度和硬度值均达到最高,分别为99.3%和1 382 HV;试样的断裂韧性良好.
The 3 mol% yttria-stabilized zirconia coated powders were prepared by solid phase coating method and the corresponding ceramic samples were obtained by sintering at high temperature. The particle coating was characterized by scanning electron microscope(SEM),and the mechanical properties of the ceramic materials were tested and analyzed. The results indicate that the method of solid phase uniform coating is beneficial to the uniform mixing of the two oxides. When the size ratio of zirconia to yttrium was 16 ∶ 1,the coating structure was clear. Both the relative density and the hardness of the ceramic samples after sintering reached the highest,which was 99. 3% and 1 382 HV,respectively. The sample has excellent fracture toughness.
The 3 mol% yttria-stabilized zirconia coated powders were prepared by solid phase coating method and the corresponding ceramic samples were obtained by sintering at high temperature. The particle coating was characterized by scanning electron microscope(SEM),and the mechanical properties of the ceramic materials were tested and analyzed. The results indicate that the method of solid phase uniform coating is beneficial to the uniform mixing of the two oxides. When the size ratio of zirconia to yttrium was 16 ∶ 1,the coating structure was clear. Both the relative density and the hardness of the ceramic samples after sintering reached the highest,which was 99. 3% and 1 382 HV,respectively. The sample has excellent fracture toughness.
引文
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[2]路学成,任莹.先进结构陶瓷材料的研究进展[J].佛山陶瓷,2009,1:37-43.
[3]Garvie R C,Nicholson P S.Structure and Thermomechanical Properties of partially stabilized in the system Ca O-Zr O2[J].J.Am.Ceram.Soc.1972,55(4):152-157.
[4]蒋阳,陶珍东.粉体工程[M].武汉:武汉理工大学出版社,2008.
[5]谢志鹏.结构陶瓷[M].北京:清华大学出版社,2011.
[6]吴建生,张春柏,等.材料制备技术[M].上海:上海交通大学出版社,1996.
[7]闫联生,余慧琴,宋麦丽,等.纳米陶瓷复合材料研究进展[J].宇航材料工艺,2003,(1):6-9.
[8]Homola A M,Lorenz R M,Sussner H.Ultrathin particulate Magnetic recording media[J].J Appl Phys,1987,61:3898.
[9]谢凤宽,陈晓磊,庄书娟.李超.液相沉积法表面包覆改性纳米陶瓷微粒及机理研究进展[J].材料导报,2006,(3):335-339.
[10]余凤秀,余俊,王珊,等.包覆结构复相陶瓷粉体制备工艺浅析[J].科技创新导报,2015,(32):114-115.
[11]李启厚,吴希桃,黄亚军,等.超细粉体材料表面包覆技术的研究现状[J].粉末冶金材料科学与工程,2009,(1):1-6.
[12]邓飞云,武笑宇,余向飞,等.超细粉体表面包覆技术研究进展[J].材料开发与应用,2012,(6):102-104.
[13]施建林.固相烧结-Ⅲ实验:超细氧化锆素坯烧结过程中的晶粒与气孔生长及致密化行为[J].硅酸盐学报,1998,26(1):1-13.
[14]韩敏芳,彭苏萍,杨翠柏.氧化锆纳米粉体烧结性能研究[J].材料科学与工艺,2004,12(1):29-30.
[15]Fan Z,Lin L F,Wang E Z.Effect of micro-alumina content on mechanical properties of Al2O3/3Y-TZP composites[J].Ceramics International,2015,41:12417-12425.
[16]赵龙江,桑可正,雒融,等.添加Zr Si04制备Al2O3/Zr O2/莫来石复相陶瓷的组织及力学性能研究[J].硅酸盐学报,2016,(1):275-278,291.