title: Mechanistic features of nanodiamonds in the lapping of magnetic heads.
abstract: Nanodiamonds, which are the main components of slurry in the precision lapping process of magnetic heads, play an important role in surface quality. This paper studies the mechanistic features of nanodiamond embedment into a Sn plate in the lapping process. This is the first study to develop mathematical models for nanodiamond embedment. Such models can predict the optimum parameters for particle embedment. From the modeling calculations, the embedded pressure satisfies p 0 = (3/2) · (W/πa (2)) and the indentation depth satisfies δ = k1√P/HV. Calculation results reveal that the largest embedded pressure is 731.48 GPa and the critical indentation depth δ is 7 nm. Atomic force microscopy (AFM), scanning electron microscopy (SEM), and Auger electron spectroscopy (AES) were used to carry out surface quality detection and analysis of the disk head. Both the formation of black spots on the surface and the removal rate have an important correlation with the size of nanodiamonds. The results demonstrate that an improved removal rate (21 nm · min(-1)) can be obtained with 100 nm diamonds embedded in the plate.
authors.affiliation: School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China.
authors.forename: Xionghua
authors.initials: X
authors.lastname: Jiang
authors.affiliation: School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275, China.
authors.forename: Zhenxing
authors.initials: Z
authors.lastname: Chen
authors.affiliation: National Center for Nanoscience & Technology of China, Beijing 100190, China.
authors.forename: Joy
authors.initials: J
authors.lastname: Wolfram
authors.affiliation: Department of Emergency, Jinling Hospital Medical School of Nanjing University, Nanjing 210000, China.
authors.forename: Zhizhou
authors.initials: Z
authors.lastname: Yang
mesh_terms: D008280:Magnetics; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D058612:Nanodiamonds / Q000737:chemistry* / Q000648:ultrastructure*; D049329:Nanostructures / Q000737:chemistry / Q000648:ultrastructure
chemical_list: D058612:Nanodiamonds