Nanoindentation hardness of particles used in magnetorheological finishing (MRF)

Статья. Опубликована в журнале "LLE Review". – 2000. – Vol. 82 – P. 107-118.Название на русском языке: Наноиндентирование твердости частиц, используемых при магнитореологическом полировании.Авторы: A.B. Shorey, K.M. Kwong, K.M. Johnson, S.D. Jacobs.Аннотация к статье на английском языке:
A technique for nanoindentation of small, magnetic and nonmagnetic abrasive particles has been described. Most results are consistent with what has been previously reported, but some results are new. While Krell et al.28 show microhardness differences in various grinding aluminas, it is interesting to see Figure 82.65 The relative nanohardness values of the particles, glasses, and crystal that have been indented (in air) at 5-mN load on the nanoindenter. the large differences in nanohardness values of the actual commercial products used in grinding and polishing. The literature contains only Moh’s hardness data for cerium oxide abrasives. We report here, for the first time, an actual nanohardness value for individual cerium oxide abrasives. The tests and procedures described here allow for the characterization of the mechanical properties of small particles that is not possible through microindentation without sintering or using samples much larger than those normally used. This allows for the study of abrasives in forms actually used in polishing, so that full characterization of the mechanical properties of polishing materials is now possible. Furthermore, removal experiments using various combinations of magnetic and nonmagnetic abrasive particles and slurry fluid chemistries should give valuable information in the future regarding the removal mechanisms for MRF.