The effect of indenter heating on indentation creep testing of MgO

Indentation testing is an important method for assessing the properties of materials, particularly ceramics and ultrahard materials, which are difficult to characterise by other means. Elevated temperature and extended time indentation testing of such materials provides an experimental means of inve...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials science letters 2001-10, Vol.20 (19), p.1819-1821
Main Authors: REN, X. J, HOOPER, R. M, GRIFFITHS, C, HENSHALL, J. L
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Miscellaneous
Technical ceramics
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Indentation testing is an important method for assessing the properties of materials, particularly ceramics and ultrahard materials, which are difficult to characterise by other means. Elevated temperature and extended time indentation testing of such materials provides an experimental means of investigating the deformation, which can be interpreted in terms of the relevant mechanisms. The influence of various experimental parameters, such as specimen orientation, applied load, sample/surface preparation, vibrations and operator dependence have been thoroughly investigated previously. This is not the case for the experimental procedure for the investigation of indentation testing at elevated temperatures, and indeed Everitt has noted that for the magnesium oxide (MgO) hardness results obtained in her experimental apparatus there was a very marked influence of heating method. Conventionally, the heating is supplied either from experimental detail is not reported. The purpose of this note is to compare the influence of variations in indenter heating/pre-heating on the resultant indentation hardness values in MgO for temperatures up to 600 deg C and dwell times up to 1800 s.
ISSN:0261-8028
DOI:10.1023/A:1012555704873