Simple technique for observing subsurface damage in machining of ceramics

Journal Article · Sun May 01 00:00:00 EDT 1994 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1994.tb05424.x· OSTI ID:7045394

Xu, H H.K.; Jahanmir, S ^[1]

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1. National Inst. of Standards and Technology, Gaithersburg, MD (United States)

A simple technique is proposed for directly observing subsurface damage in the machining of ceramics. The technique requires two polished specimens and an optical microscope with Nomarski illumination for examination. The subsurface damage created by the grinding of an alumina ceramic is investigated using this technique. The mode of damage is identified as intragrain twinning/slip, and intergranular and transgranular cracking. Chipping along the twinned planes and along the transgranular crack planes, and dislodgement of the intergranularly debonded grains are suggested to be the mechanisms of material removal in the machining of this alumina ceramic.

• OSTI ID: 7045394
• Journal Information: Journal of the American Ceramic Society; (United States), Vol. 77:5; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM OXIDES
MACHINING
CERAMICS
CRACK PROPAGATION
DAMAGE
TWINNING
ALUMINIUM COMPOUNDS
CHALCOGENIDES
OXIDES
OXYGEN COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication