We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Subsurface mechanical damage correlations after grinding of various optical materials
Summary
Researchers studied how loose abrasive grinding causes subsurface damage in various optical materials. This materials engineering paper has no relevance to environmental microplastics.
Loose abrasive grinding was performed on a wide range of optical workpiece materials [single crystals of Al2O3 (sapphire), SiC, Y3Al5O12 (YAG), CaF2, and LiB3O5 (LBO); a SiO2-Al2O3-P2O5-Li2O glass-ceramic (Zerodur); and glasses of SiO2 : TiO2 (ULE), SiO2 (fused silica), and P2O5-Al2O3-K2O-BaO (phosphate)]. Using the magneto rheological finishing (MRF) taper wedge technique (where a wedge was polished on each of the ground workpieces and the resulting samples were appropriately chemically etched), the subsurface mechanical damage (SSD) characteristics were measured. The SSD depth for most of the workpiece materials was found to scale as E11/2 / H1, where E1 is the elastic modulus and H1 is the hardness of the workpiece. This material scaling is the same as that for the growth of lateral cracks, suggesting that lateral cracks are a dominant source for SSD rather than radial/median cracks, as previously proposed. Utilizing the SSD depth data from both this study and others, semiempirical relationships have been formulated, which allows for estimating the SSD depth as a function of workpiece material and important grinding parameters (such as abrasive size and applied pressure).
Sign in to start a discussion.
More Papers Like This
Experimental and Numerical Investigation on the Effect of Scratch Direction on Material Removal and Friction Characteristic in BK7 Scratching
This materials science study examined how the direction of nanoscratching affects crack formation and material removal in optical glass. The research is focused on precision manufacturing and has no direct relevance to microplastics or environmental health.
On the Formation and Characterization of Nanoplastics During Surface Wear Processes
Researchers characterized nanoplastic particle generation during surface wear processes, finding that mechanical abrasion of bulk plastic materials produces a broad size distribution of particles including sub-100 nm fragments, with surface wear rate depending on polymer hardness and contact conditions.
Direct Correlations among the Grain Size, Texture, and Indentation Behavior of Nanocrystalline Nickel Coatings
Researchers studied how grain size affects the mechanical properties of nanocrystalline nickel coatings. This materials science paper is unrelated to environmental microplastics.
Surface Mechanical Properties and Topological Characteristics of Thermoplastic Copolyesters after Precisely Controlled Abrasion
This study characterized surface mechanical properties and texture changes in thermoplastic copolyesters after controlled abrasion testing. Understanding how polymer surfaces wear is relevant to microplastic generation, since mechanical abrasion of plastic products is a key pathway through which microplastics are released into the environment.
Nanoindentation tests on diamond-machined silicon wafers
This precision manufacturing study used nanoindentation to examine how diamond-turning creates an amorphous surface layer on silicon wafers, finding this layer has different mechanical properties than pristine silicon. This is a semiconductor manufacturing study with no relevance to environmental microplastics.