Some speculations on the mechanisms of abrasive grinding and polishing

Conference · Mon May 11 00:00:00 EDT 1987

OSTI ID:6042384

Brown, N J

The mechanisms of grinding, a predominantly fracture mechanism in brittle material, and polishing, a predominantly plastic shearing mechanism, appear quite different. However, in a number of cases it can be shown that the difference between the two mechanisms can be triggered by differences in depth of cut and abrasive size. This paper will present results from recent polishing research that tend to support a physico-chemical interaction model involving aqueous diffusion, internal hydrolysis, and ion exchange mechanisms that may explain the plastic to brittle transition in silicate materials. The model would seem to have clear implications for both low scatter polishing and fine machining of silicate materials.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6042384
• Report Number(s): UCRL-96159; CONF-8705183-1; ON: DE87014242
• Resource Relation: Conference: 4. international precision engineering seminar, Cranfield, UK, 11 May 1987; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
REACTION KINETICS
GRINDING
POLISHING
SILICATES
ABRASIVES
BRITTLENESS
CHEMICAL PHYSICS
GLASS
ION EXCHANGE
PLASTICITY
SHEAR
SURFACES
TOOLS
COMMINUTION
KINETICS
MACHINING
MECHANICAL PROPERTIES
OXYGEN COMPOUNDS
PHYSICS
SILICON COMPOUNDS
SURFACE FINISHING
360101* - Metals & Alloys- Preparation & Fabrication