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ASTM C1326

Standard Test Method for Knoop Indentation Hardness of Advanced Ceramics

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Organization: ASTM
Publication Date: 1 August 2013
Status: active
Page Count: 10
ICS Code (Advanced ceramics): 81.060.30
scope:

This test method covers the determination of the Knoop indentation hardness of advanced ceramics. In this test, a pointed, rhombic-based, pyramidal diamond indenter of prescribed shape is pressed into the surface of a ceramic with a predetermined force to produce a relatively small, permanent indentation. The surface projection of the long diagonal of the permanent indentation is measured using a light microscope. The length of the long diagonal and the applied force are used to calculate the Knoop hardness which represents the material's resistance to penetration by the Knoop indenter.

The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

Units-When Knoop and Vickers hardness tests were developed, the force levels were specified in units of gramsforce (gf) and kilograms-force (kgf). This standard specifies the units of force and length in the International System of Units (SI); that is, force in newtons (N) and length in mm or μm. However, because of the historical precedent and continued common usage, force values in gf and kgf units are occasionally provided for information. This test method specifies that Knoop hardness be reported either in units of GPa or as a dimensionless Knoop hardness number.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Document History

ASTM C1326
August 1, 2013
Standard Test Method for Knoop Indentation Hardness of Advanced Ceramics
This test method covers the determination of the Knoop indentation hardness of advanced ceramics. In this test, a pointed, rhombic-based, pyramidal diamond indenter of prescribed shape is pressed...
August 1, 2013
Standard Test Method for Knoop Indentation Hardness of Advanced Ceramics
This test method covers the determination of the Knoop indentation hardness of advanced ceramics. In this test, a pointed, rhombic base, pyramidal diamond indenter of prescribed shape is pressed into...
August 1, 2008
Standard Test Method for Knoop Indentation Hardness of Advanced Ceramics
This test method covers the determination of the Knoop indentation hardness of advanced ceramics. The values stated in SI units are to be regarded as standard. No other units of measurement are...
August 1, 2008
Standard Test Method for Knoop Indentation Hardness of Advanced Ceramics
This test method covers the determination of the Knoop indentation hardness of advanced ceramics. The values stated in SI units are to be regarded as standard. No other units of measurement are...
October 1, 2003
Standard Test Method for Knoop Indentation Hardness of Advanced Ceramics
This test method covers the determination of the Knoop indentation hardness of advanced ceramics. This standard does not purport to address all of the safety concerns, if any, associated with its...
January 10, 1999
Standard Test Method for Knoop Indentation Hardness of Advanced Ceramics
1. Scope 1.1 This test method covers the determination of the Knoop indentation hardness of advanced ceramics. 1.2 This standard does not purport to address all of the safety concerns, if any,...
December 10, 1996
Standard Test Method for Knoop Indentation Hardness of Advanced Ceramics
A description is not available for this item.
January 1, 1996
Standard Test Method for Knoop Indentation Hardness of Advanced Ceramics
A description is not available for this item.

References

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