BS ISO 14705:2016 pdf download

BS ISO 14705:2016 pdf download.Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for hardness of monolithic ceramics at room temperature
1 Scope
This document specifies a test method for determining the Vickers and Knoop hardness of monolithic fine ceramics at room temperature.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 4545-1, Metallic materials — Knoop hardness test — Part 1: Test method
ISO 4545-2, Metallic materials — Knoop hardness test — Part 2: Verification and calibration of testing machines
ISO 4545-4, Metallic materials — Knoop hardness test — Part 4: Table of hardness values
ISO 6507-1, Metallic materials — Vickers hardness test — Part 1: Test method
ISO 6507-2, Metallic materials — Vickers hardness test — Part 2: Verification and calibration of testing machines
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1 Vickers hardness
value obtained by dividing the applied force by the surface area of the indentation computed from the mean of the measured diagonals of the indentations, assuming that the indentation is an imprint of the undeformed indenter
Note 1 to entry: Vickers hardness may be expressed in two different units:
a) with unit GPa, obtained by dividing the applied force in N by the surface area of the indentation in mm 2 ;
b) Vickers hardness number, obtained by dividing the applied force in kgf by the surface area of the indentation in mm 2
3.2 Vickers indenter
indenter in the shape of a right-angle pyramid with a square base and an angle between opposite faces of 136°
Note 1 to entry: See Table 1 and Figure 1.
3.3 Knoop hardness
value obtained by dividing the applied force by the projected area of the indentation computed from the measurement of the long diagonal of the indentation, assuming that the indentation is an imprint of the undeformed indenter
Note 1 to entry: The Knoop hardness may be expressed in two different units:
a) with units of GPa, obtained by dividing the applied force in N by the projected area of the indentation in mm 2 ;
b) Knoop hardness number, obtained by dividing the applied force in kgf by the projected area of the indentation in mm 2 , without units specified.
3.4 Knoop indenter indenter in the shape of a rhombic-based pyramid with the two angles between the opposite edges at
172,5° and 130°
Note 1 to entry: See Table 3 and Figure 6.