Nano-scale texturing of glass material using fine particle peening and its application for anti-fouling surface against powder adhesion

This paper is the English version of a paper originally published in the Journal of the Japan Society for Abrasive Technology, 69, 4 (2025) 208–-214. DOI: 10.11420/69.208.Abstract: Abrasive jet processing conducted to glasses as a brittle material typically induced surface roughening via material removal in brittle manner. In the cases of precision cutting and grinding, it has been well known that decreasing in depth of cut results in brittle-ductile transition in material removal mechanism, promoting excellent surface quality. In this study, the authors attempted to fine particle peening, which was of an abrasive jet processing, specially aiming surface processing via ductile manner mechanism and then fabricating surface texture much more precise than the conventional peening technique. Collision dents observed on the peened glass surface under shallow peening angles implied that plastic flow of glasses occurred when the material was peened. As a result, precise surface texture of 0.1 μm in sizes was fabricated on the glass surface under appropriate peening conditions. Ductile-mode processing of the glass by fine particle peening was implied because the depth of the dents did not deviate from the critical depth of cut of the glass determined with nanoscratching. Advantages of the fabricated precise texture of several hundred nanometers in size was explored by conducting powder adhesion test on the textured glass specimens. Results revealed that the anti-fouling performances against powder adhesion was greater in the textured glass than in the unpeened one with the smooth surface. The anti-fouling performance was found to be obtained if the size of the powder to be adhered was equal to or larger than the spacing in peaks of the texture.