D0:10.13374/.issn1001-053x.2013.07.010 第35卷第7期 北京科技大学学报 Vol.35 No.7 2013年7月 Journal of University of Science and Technology Beijing Jul.2013 超音速等离子喷涂YPSZ涂层的组织及耐磨性能 张建1,2)，杨军1)凶，朱浪涛) 1)西安建筑科技大学冶金工程学院，西安710055 2)首钢京唐钢铁联合有限责任公司炼铁作业部炼铁分厂，唐山063200 ☒通信作者，E-mail:6292 yangjun@163.com 摘要为了研制一种连铸结晶器耐高温耐磨材料，采用超音速等离子喷涂法在纯铜板上制备了氧化钇部分稳定的氧化 锆(YPSZ)涂层.利用X射线衍射仪、扫描电镜、彩色3D激光显微镜和图形软件(Image-pro Plus3.0)对YPSZ涂层的 微观组织进行表征，通过销盘式磨损仪在室温干摩擦条件下测试了涂层的耐磨性能及化学硬化对涂层耐磨性能的影响. 研究发现YPSZ涂层完全由t'-ZO2相组成，其断口形貌由柱状晶和一定量的部分熔融颗粒组成，截面组织形态表现出 较好的完整性，涂层孔隙率为1.2%，表面粗糙度为6.457u.磨损实验表明化学硬化前YPSZ涂层与刚玉球对磨时的 摩擦因数在0.5~0.6之间，平均磨痕宽度为3638.8um,磨损体积为1.25508×10-2mm3,磨损机制为脆性断裂导致的磨 粒磨损：化学硬化后YPSZ涂层的磨痕宽度和磨损体积均有大幅降低，脆断程度也更轻，其磨损性能得到极大改善. 关键词等离子喷涂：锆质耐火材料：涂层：微观组织：耐磨性能：化学硬化 分类号TB321 Microstructure and wear resistance of YPSZ coatings deposited by supersonic plasma spraying ZHANG Jian1,2),YANG Jun)☒，ZHU Lang-tao1) 1)School of Metallurgical Engineering,Xi'an University of Architecture Technology,Xi'an 710055,China 2)Branch Factory of Ironmaking,Department of Ironmaking,Shougang Jingtang United Iron and Steel Co.,Ltd.,Tangshan 063200, China Corresponding author,E-mail:6292yangjun@163.com ABSTRACT In order to obtain a kind of high temperature-resistant and wear-resistant material for continuous casting molds,yttria partially stabilized zirconia (YPSZ)coatings were prepared on pure copper substrates by high- efficiency supersonic atmosphere plasma spraying(SAPS).The microstructure of the coatings was characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM),color 3D laser scanning microscopy and image software (Image-pro Plus).The wear resistance of the coatings and the effect of chemical hardening on the wear resistance were investigated through a pin-on-disk tribometer under dry friction at room temperature.It is found that the composition of the coatings is completely t'-ZrO2 phase.The fracture microstructure is composed of columnar crystals and a small amount of partially melted particles.The cross-sectional morphology exhibits good integrity.The porosity and the surface roughness are 1.2%and 6.457 um,respectively.Pin-on-disk test against corundum show that the friction coefficient,average wear width and wear volume of the coatings before chemical hardening is 0.5 to 0.6,3638.8 um and 1.25508x10-2 mm3,respectively.The wear mechanism is abrasive wear resulting from brittle fracture.The wear resistance of the coating after chemistry hardening is greatly improved that the width and volume of wear reduce drastically and the degree of brittle fracture is lighter. KEY WORDS plasma spraying;zirconia refractories;coatings;microstructure;wear resistance;chemical hardening 收稿日期：2012-04-12 基金项目：西安交通大学金属材料强度国家重点实验室开放研究项目(20131314)第 35 卷 第 7 期 北 京 科 技 大 学 学 报 Vol. 35 No. 7 2013 年 7 月 Journal of University of Science and Technology Beijing Jul. 2013 超音速等离子喷涂 YPSZ 涂层的组织及耐磨性能 张 建1,2)，杨 军1) ，朱浪涛1) 1) 西安建筑科技大学冶金工程学院，西安 710055 2) 首钢京唐钢铁联合有限责任公司炼铁作业部炼铁分厂，唐山 063200 通信作者，E-mail: 6292yangjun@163.com 摘 要 为了研制一种连铸结晶器耐高温耐磨材料，采用超音速等离子喷涂法在纯铜板上制备了氧化钇部分稳定的氧化 锆 (YPSZ) 涂层. 利用 X 射线衍射仪、扫描电镜、彩色 3D 激光显微镜和图形软件 (Image-pro Plus3.0) 对 YPSZ 涂层的 微观组织进行表征，通过销盘式磨损仪在室温干摩擦条件下测试了涂层的耐磨性能及化学硬化对涂层耐磨性能的影响. 研究发现 YPSZ 涂层完全由 t’-ZrO2 相组成，其断口形貌由柱状晶和一定量的部分熔融颗粒组成，截面组织形态表现出 较好的完整性，涂层孔隙率为 1.2%，表面粗糙度为 6.457 µm. 磨损实验表明化学硬化前 YPSZ 涂层与刚玉球对磨时的 摩擦因数在 0.5∼0.6 之间，平均磨痕宽度为 3638.8 µm，磨损体积为 1.25508×10−2 mm3，磨损机制为脆性断裂导致的磨 粒磨损；化学硬化后 YPSZ 涂层的磨痕宽度和磨损体积均有大幅降低，脆断程度也更轻，其磨损性能得到极大改善. 关键词 等离子喷涂；锆质耐火材料；涂层；微观组织；耐磨性能；化学硬化 分类号 TB321 Microstructure and wear resistance of YPSZ coatings deposited by supersonic plasma spraying ZHANG Jian 1,2), YANG Jun 1) , ZHU Lang-tao 1) 1) School of Metallurgical Engineering, Xi’an University of Architecture & Technology, Xi’an 710055, China 2) Branch Factory of Ironmaking, Department of Ironmaking, Shougang Jingtang United Iron and Steel Co., Ltd., Tangshan 063200, China Corresponding author, E-mail: 6292yangjun@163.com ABSTRACT In order to obtain a kind of high temperature-resistant and wear-resistant material for continuous casting molds, yttria partially stabilized zirconia (YPSZ) coatings were prepared on pure copper substrates by high￾efficiency supersonic atmosphere plasma spraying (SAPS). The microstructure of the coatings was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), color 3D laser scanning microscopy and image software (Image-pro Plus). The wear resistance of the coatings and the effect of chemical hardening on the wear resistance were investigated through a pin-on-disk tribometer under dry friction at room temperature. It is found that the composition of the coatings is completely t’-ZrO2 phase. The fracture microstructure is composed of columnar crystals and a small amount of partially melted particles. The cross-sectional morphology exhibits good integrity. The porosity and the surface roughness are 1.2% and 6.457 µm, respectively. Pin-on-disk test against corundum show that the friction coefficient, average wear width and wear volume of the coatings before chemical hardening is 0.5 to 0.6, 3638.8 µm and 1.25508×10−2 mm3 , respectively. The wear mechanism is abrasive wear resulting from brittle fracture. The wear resistance of the coating after chemistry hardening is greatly improved that the width and volume of wear reduce drastically and the degree of brittle fracture is lighter. KEY WORDS plasma spraying; zirconia refractories; coatings; microstructure; wear resistance; chemical hardening 收稿日期：2012–04–12 基金项目：西安交通大学金属材料强度国家重点实验室开放研究项目（20131314） DOI:10.13374/j.issn1001-053x.2013.07.010