Microtribological studies of Al2O3, Al2O3-TiC, polycrystalline and single-crystal Mn-Zn ferrite, and SiC head slider materials

被引:25
作者
Koinkar, VN
Bhushan, B
机构
[1] Comp. Microtribology C., Department of Mechanical Engineering, Ohio State University, Columbus, OH 43210-1107
关键词
magnetic storage devices; microtribology; indentation hardness; head materials; atomic force friction force microscopy;
D O I
10.1016/S0043-1648(96)07321-8
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
Surface topography, friction, scratching, wear and nanoindentation behavior of head slider materials were studied using atomic force/ friction force microscopy (AFM/FFM). Materials studied include polycrystalline Al2O3, Al2O3-TiC (70-30 wt.%), polycrystalline Mn-Zn ferrite, single-crystal Mn-Zn ferrite and polycrystalline SiC. Al2O3 is not used for construction of head slider but it was studied for comparisons with Al2O3-TiC. SiC is a candidate slider material. The Al2O3-TiC specimen exhibits the highest coefficient of microscale friction followed by polycrystalline Mn-Zn ferrite, Al2O3, single-crystal Mn-Zn ferrite and SiC. Two phase Al2O3-TiC exhibited higher microscale friction than a single phase Al2O3 and polycrystalline Mn-Zn ferrite exhibits higher microscale friction than a single-crystal Mn-Zn ferrite. The local variation in friction force for Al2O3, polycrystalline and single-crystal Mn-Zn ferrite was found to correspond to the local surface slope (first derivative of the surface roughness profile). For Al2O3-TiC and SiC specimen, the local variation in friction force at the scratches corresponds to the local surface slope. However, local variation over entire region corresponds to the different phases present on the specimen surface. Thus friction force imaging can be used for structural mapping of the surfaces. Directionality effects in the friction were studied on a microscale for the Al2O3 specimen. Macroscale friction values for all samples are higher than microscale friction values as there is less ploughing contribution in microscale friction measurements. Microscratching/wear studies indicate that scratch and wear resistance of SiC and Al2O3 are higher than that of the other specimens. However, Al2O3 specimen shows the presence of porous holes on the surface that affect the wear performance. Al2O3 specimen exhibits superior microscratch and microwear resistance than Al2O3-TiC. Wear evolution for single and two phase materials was studied in detail. Nanoindentation hardness values found to be generally higher than that of microhardness data. Based on these measurements, coefficient of friction, microscratch and microwear resistance of single phase materials are superior to that of two phase materials.
引用
收藏
页码:110 / 122
页数:13
相关论文
共 15 条
[1]   TRIBOLOGICAL STUDIES OF SILICON FOR MAGNETIC RECORDING APPLICATIONS [J].
BHUSHAN, B ;
KOINKAR, VN .
JOURNAL OF APPLIED PHYSICS, 1994, 75 (10) :5741-5746
[2]  
Bhushan B., 1994, Proceedings of the Institution of Mechanical Engineers, Part J (Journal of Engineering Tribology), V208, P17, DOI 10.1243/PIME_PROC_1994_208_346_02
[3]  
Bhushan B., 1995, HDB MICRONANOTRIBOLO
[4]  
BHUSHAN B, IN PRESS PHILOS MAG
[5]  
Bhushan B., 1996, TRIBOLOGY MECH MAGNE, DOI 10.1007/978-1-4612-2364-1
[6]  
Bowden FP, 2001, Friction and Lubrication of Solids
[7]  
Buckley D.H., 1981, SURFACE EFFECTS ADHE
[8]   WEAR BEHAVIOR OF CERAMIC SLIDERS IN SLIDING CONTACT WITH RIGID MAGNETIC THIN-FILM DISKS [J].
CHU, MY ;
BHUSHAN, B ;
DEJONGHE, LC .
TRIBOLOGY TRANSACTIONS, 1992, 35 (04) :603-610
[9]  
GOLDSTEIN JI, 1992, SCANNING ELECTRON MI
[10]  
KWON OH, 1996, COMMUNICATION