ISO 26602:2017
(Main)Fine ceramics (advanced ceramics, advanced technical ceramics) — Silicon nitride materials for rolling bearing balls and rollers
Fine ceramics (advanced ceramics, advanced technical ceramics) — Silicon nitride materials for rolling bearing balls and rollers
ISO 26602:2017 specifies the requirements for preprocessed silicon nitride materials for rolling bearing balls and rollers. ISO 26602:2017 provides a classification defining physical and mechanical properties of silicon nitride preprocessed bearing rolling element materials. The materials are classified in three categories by the specification of characteristics and microstructures. Methods for sample preparation and observation of microstructures are provided in Annex A. NOTE 1 The silicon nitride product means the sintered body of which the main component is silicon nitride material. NOTE 2 ISO 26602:2017 can be used for processed rolling bearing balls and rollers upon consultation between the parties concerned.
Céramiques techniques — Matériaux en nitrure de silicium pour billes utilisées dans les roulements à billes
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 26602
Second edition
2017-10
Fine ceramics (advanced ceramics,
advanced technical ceramics) —
Silicon nitride materials for rolling
bearing balls and rollers
Céramiques techniques — Matériaux en nitrure de silicium pour billes
utilisées dans les roulements à billes
Reference number
©
ISO 2017
© ISO 2017, Published in Switzerland
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ii © ISO 2017 – All rights reserved
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Physical and mechanical properties . 2
5 Material classification . 2
6 Test . 3
6.1 Density . 3
6.2 Elastic modulus . 3
6.3 Poisson’s ratio . 3
6.4 Coefficient of thermal expansion . 3
6.5 Flexural strength and Weibull modulus . 3
6.6 Hardness . 3
6.7 Indentation fracture resistance . 3
6.8 Microstructure . 3
7 Test report . 4
Annex A (normative) Microstructure observation procedure . 5
Annex B (normative) Material classification for silicon nitride materials .6
Bibliography . 7
Foreword
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described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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URL: www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 206, Fine ceramics.
This second edition cancels and replaces the first edition (ISO 26602:2009), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— the title has been revised;
— Clauses 1, 2, 3, 5, 6 have been revised;
— Annex A has been revised;
— Table B.1 has been revised;
— bibliography has been revised.
iv © ISO 2017 – All rights reserved
INTERNATIONAL STANDARD ISO 26602:2017(E)
Fine ceramics (advanced ceramics, advanced technical
ceramics) — Silicon nitride materials for rolling bearing
balls and rollers
1 Scope
This document specifies the requirements for preprocessed silicon nitride materials for rolling bearing
balls and rollers.
This document provides a classification defining physical and mechanical properties of silicon nitride
preprocessed bearing rolling element materials. The materials are classified in three categories by the
specification of characteristics and microstructures. Methods for sample preparation and observation
of microstructures are provided in Annex A.
NOTE 1 The silicon nitride product means the sintered body of which the main component is silicon nitride
material.
NOTE 2 This document can be used for processed rolling bearing balls and rollers upon consultation between
the parties concerned.
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 14627, Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for fracture
resistance of silicon nitride materials for rolling bearing balls at room temperature by indentation fracture
(IF) method
ISO 14704, Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for flexural
strength of monolithic ceramics at room temperature
ISO 14705, Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for hardness of
monolithic ceramics at room temperature
ISO 17561, Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for elastic
moduli of monolithic ceramics at room temperature by sonic resonance
ISO 17562, Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for linear
thermal expansion of monolithic ceramics by push-rod technique
ISO 18754, Fine ceramics (advanced ceramics, advanced technical ceramics) — Determination of density
and apparent porosity
ISO 20501, Fine ceramics (advanced ceramics, advanced technical ceramics) — Weibull statistics for
strength data
ISO 20507, Fine ceramics (advanced ceramics, advanced technical ceramics) — Vocabulary
3 Terms and definitions
For the purposes of t
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