摘要
采用化学气相沉积(CVD)方法在硬质合金刀片上制备了三种B的原子分数分别为10.1%,26.8%,52.0%的TiBN涂层,系统地研究了B的原子分数对于涂层形貌、力学性能和摩擦性能的影响。X射线衍射仪(XRD)和X射线光电子能谱仪(XPS)检测结果表明,在B的原子分数低时,涂层以TiN相为主,伴有六方TiB2相和非晶BN相。随着B的原子分数的上升,TiN相减少,涂层以TiB2相为主,涂层断口也由无定形转变为柱状晶。B的原子分数的增加也对涂层硬度和摩擦性能有着明显的影响,三种涂层的硬度分别为37.8±1.6,39.7±0.8和41.7±2.9 GPa,摩擦系数也从0.511增加到0.705。B的原子分数达到52%的涂层因为其高硬度而有着最好的耐磨性,涂层磨损率为最低的49.4×10^(‒8)mm^(3)/(N·m),是几种成分中力学性能与摩擦性能最好的涂层。
In this study,TiBN coatings with three different boron(B)atomic fractions of 10.1%,26.8%,and 52.0%are prepared on the cemented carbide inserts by chemical vapor deposition(CVD).The influence of B atomic fractions on the morphology,mechanical properties,and tribological properties of the coatings is systematically investigated.The results of X-ray diffraction(XRD)and X-ray photoelectron spectroscopy(XPS)reveal that at low B atomic fractions,the coatings are dominated by TiN phase with hexagonal TiB2 and amorphous BN phases.As the B atomic fractions increases,the TiN phase decreases,and the TiB2 phase becomes dominant.The fracture morphology of the coatings changes from amorphous to columnar crystal.The increase in B atomic fractions also has a significant influence on the coating hardness and tribological properties,with the hardness of 37.8±1.6 GPa,39.7±0.8 GPa and 41.7±2.9 GPa,respectively,and the friction coefficient increasing from 0.511 to 0.705.The coating with 52%B atomic fractions exhibits the best wear resistance due to its high hardness,and the coating wear rate is the lowest 49.4×10−8 mm^(3)/(N‧m),which is the best coating in terms of mechanical and frictional properties among several compositions.
作者
李博
邱联昌
曾芳芳
谢标明
杜勇
LI Bo;QIU Lianchang;ZENG Fangfang;XIE Biaoming;DU Yong(State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China;Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technol-ogy,Ganzhou 341000,China;Ganzhou Achteck Tool Technology Co.,Ltd.,Ganzhou 341000,China)
出处
《现代交通与冶金材料》
CAS
2023年第4期32-37,共6页
Modern Transportation and Metallurgical Materials
基金
国家自然科学基金资助项目(52031017),江西省科技厅重点研发计划项目(20212BBE51017)。
关键词
TiBN涂层
化学气相沉积
力学性能
摩擦性能
TiBN coating
chemical vapor deposition
mechanical properties
tribological properties
作者简介
第一作者:李博(1999—),男,硕士研究生。研究方向:硬质合金刀具涂层。;通讯作者:邱联昌(1982—),男,博士,高级工程师。研究方向:硬质合金耐磨涂层的研发和项目管理。
