摘要
采用等离子体浸没离子注入与沉积(PIII&D)技术在AISI 52100轴承钢表面合成了高硬耐磨的TiN薄膜.膜层元素分布、化学组成和表面形貌分别用XRD,XPS表征.合成薄膜前后试样的滚动接触疲劳寿命和摩擦磨损性能分别由球棒疲劳磨损试验机和球-盘磨损试验机测定;疲劳破坏后的微观形貌通过SEM观察;薄膜力学性能经纳米压痕和纳米划痕实验评价.结果表明,TiN膜中还含有少量的TiO_2和Ti,N,O的化台物.在优化条件下,TiN膜层致密均匀,与基体结合良好,纳米硬度和弹性模量分别达到25和350 GPa;最低摩擦系数由基体的0.92下降到0.2.被处理薄膜试件在90%置信区间下的最大L_(10),L_(50),L_a和(?)寿命较基体分别提高了约4.5,1.8,1.3和1.2倍,疲劳寿命的分散性得到了显著改善.
TiN hard protective films were fabricated on AISI52100 bearing steel substrate by plasma immersion ion implantation and deposition (PIII&D) technique. The TiN films have been characterized using a variety of test methods. XRD analysis indicated that the TiN film contained a little amount of TiO2 and compounds of Ti, O and N, which has also been identified by XPS. AFM revealed the TiN film to be extremely smooth, very high uniformity and compact density over large areas. The maximum nanohardness and elastic modulus (E) of the sample after deposition of TiC are 25 and 350 GPa, increased by 127.3% and 59.1%, respectively. Ball-on disc result showed that the friction coefficients decrease from 0.92 to 0.2. The treated sample's rolling contact fatigue (RCF) life of the L10,L50,La and -↑L increases by 4:5, 1.8, 1.3 and 1.2 times, respectively. The RCF life scatter extent of treated sample is improved significantly.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2008年第3期325-330,共6页
Acta Metallurgica Sinica
基金
教育部博士点基金20060674002~~
关键词
等离子体浸没离子注入与沉积
TIN薄膜
机械性能
滚动接触疲劳寿命
轴承钢
plasma immersion ion implantation and deposition (PIII&D), TiN film, mechanical property, rolling contact fatigue life, bearing steel