Research on the formation of strength characteristics of synthetic diamond powders

DOI: 10.62564/M4-NO1017

Nonna Oliinyk, Halyna Ilnytska, Galyna Bazaliy

V. Bakul Institute for Superhard Materials of the National Academy of Sciences of Ukraine


The physical and mechanical properties of the diamond powders, in particular the strength and uniformity of the strength of the powder, primarily affect the efficiency of the abrasive tool. The purpose of the work is to study the formation of powder strength characteristics under the influence of powder flotation separation with preliminary surface activation by iron ions in an ultrasonic field in a liquid. To study the formation of the strength characteristics of powders obtained by flotation separation, powder brand AC 20 with a grain size of 100/80 of the Ni-Mn-C system was chosen. The samples for the study were made by successive two-stage flotation separation into foam and chamber with preliminary activation of the surface of the powder particles with iron ions in the ultrasonic field in the liquid. The strength characteristics of the products, in particular, the strength index under static compression were studied according to the methods of regulatory documents of Ukraine [1]. . It has been established that the application of surface preparation of AC 20 powder with a grain size of 100/80 and flotation separation leads to the possibility of obtaining powders with a strength index under static compression at the level of 17.9-12.3 N, which coincides with the strength interval of the original powder. The homogeneity in strength and the amount of the obtained powders compared to the original powder (taken as 100%) are: foam product 1 - 166% (quantity - 38.5%), foam product 2 - 100% (quantity - 34.6%), chamber product - 66.6% (quantity - 26.9%). Thus, the application of surface activation of powder particles by iron ions in an ultrasonic field in a liquid and flotation separation allows to obtain a powder with increased uniformity in strength (by 66.6%) of its quantity of 38.5% relative to the original powder.

Keywords
diamond powders, flotation separation, surface activation by iron ions, ultrasonic field

Acknowledgments
Not provided

References
[1] G.A. Petasyuk, H.D. Ilnytska, G.A. Bazalii, N.O. Oliinyk, Yu.V. Syrota, Flotation Separation as a Method of Improving the Uniformity of Synthetic Diamond Powders by Their Morphometric Characteristics, Grain Shape, and Grain Composition, Journal of Superhard Materials, 2024. Vol. 46. No. 1. pp. 65–75.