Mechanistic features of nanodiamonds in the lapping of magnetic heads

Xionghua Jiang, Zhenxing Chen, Joy Wolfram, Zhizhou Yang

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)326427
StatePublished - 2014


  • Magnetics
  • Microscopy, Atomic Force
  • Microscopy, Electron, Scanning
  • Nanodiamonds
  • Nanostructures
  • Journal Article
  • Research Support, Non-U.S. Gov't


Dive into the research topics of 'Mechanistic features of nanodiamonds in the lapping of magnetic heads'. Together they form a unique fingerprint.

Cite this