ISO 17167:2018

Name: ISO 17167:2018 — Fine ceramics (advanced ceramics, advanced technical ceramics) — Mechanical properties of monolithic ceramics at room temperature — Determination of flexural strength by the ring-on-ring test
SKU: ISO 17167:2018
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Fine ceramics (advanced ceramics, advanced technical ceramics) — Mechanical properties of monolithic ceramics at room temperature — Determination of flexural strength by the ring-on-ring test

Название (английский):

ISO 17167:2018

Fine ceramics (advanced ceramics, advanced technical ceramics) — Mechanical properties of monolithic ceramics at room temperature — Determination of flexural strength by the ring-on-ring test

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 13
Дата публикации:: 8 ноября 2018 г.
Издание:: ISO IS 17167 edition 1 version 1
ICS:: 81.060.30

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Описание (английский):

This document specifies a method for the determination of the nominal equibiaxial flexural strength by the ring-on-ring test of advanced monolithic technical ceramic materials at room temperature. This document is applicable to materials with a grain size less than 100 µm.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 17167:2018 specifies a standardized method to determine the nominal equibiaxial flexural strength of advanced monolithic technical ceramics at room temperature using the ring-on-ring test. It applies to fine ceramics (advanced/technical ceramics) with a grain size less than 100 µm. The test uses a round, discoidal specimen loaded between two concentric rings; strength is calculated from the fracture load, geometry and material Poisson ratio under the assumption of linear elastic equibiaxial bending.

Key topics and requirements

Scope: Equibiaxial flexural strength (ring-on-ring) of monolithic ceramics at room temperature; grain size < 100 µm.

Test principle: Axial load applied through a small loading ring to a disk supported on a larger concentric support ring; fracture load is used to compute nominal flexural stress.

Test pieces: Round disks with controlled thickness and diameter; surface finish options include as-fired, ground/polished, or agreed procedure. Surface preparation strongly influences results.

Test jig and dimensions:

Loading ring contact diameter: 12 ± 0.1 mm
Support ring contact diameter: 30 ± 0.1 mm
Ring contact radius of curvature: 2 ± 0.2 mm
Rings hardened (≥ 500 HV or ≥ 40 HRC) to minimize damage
Centre alignment tolerance: ≤ 0.2 mm
Ring flatness/waviness: ≤ 0.02 mm
Rubber film under support ring: thickness 0.6 ± 0.1 mm, Shore A hardness 60 ± 5

Apparatus & measurement:

Test machine: shock-free loading, record maximum force; accuracy per ISO 7500‑1 (grade 1).
Dimensional measurement: resolution ≤ 0.1% of dimension (e.g., thickness resolution ≤ 0.002 mm, diameter ≤ 0.04 mm).
Environmental monitoring: temperature resolution ≥ 1 °C, humidity resolution ≥ 5% RH.

Data interpretation: Results reported as mean ± standard deviation; further statistical analysis (for design data) recommended (see ISO 20501). Fractography is advised to identify fracture origins.

Warnings: Exercise caution when extrapolating ring-on-ring strength to other stress states, geometries, rates, or environments.

Applications

Material development and characterization of advanced ceramics (e.g., alumina, zirconia-based ceramics).

Quality control and batch verification in ceramic manufacturing.

Generating design data for engineering components that rely on biaxial strength information (thin disks, implant ceramics).

Fractography and failure analysis to locate strength-limiting defects (surface, edge, or internal).

Who should use ISO 17167:2018

Materials scientists and ceramic engineers performing mechanical testing of fine ceramics.

Quality and laboratory managers in production and R&D environments.

Test laboratories seeking ISO-compliant procedures for equibiaxial flexural testing.

Designers and reliability engineers requiring standardized biaxial strength data.

Related standards

ISO 7500-1 (calibration/verification of force-measuring systems)

ISO/IEC 17025 (laboratory competence)

ISO 6474-1 and ASTM C1499 (related ceramic flexural test methods)

ISO 20501 (statistical evaluation of strength data)

Keywords: ISO 17167:2018, ring-on-ring test, equibiaxial flexural strength, fine ceramics, monolithic ceramics, advanced ceramics, mechanical properties, flexural strength test.

ISO 17167:2018

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications

Who should use ISO 17167:2018

Related standards

Технические детали

ISO 7500-1:2018

Metallic materials — Calibration and verification of static uniaxial testing machines — Part 1: Tension/compr…

BS EN ISO 20501:2022

Fine ceramics (advanced ceramics, advanced technical ceramics). Weibull statistics for strength data.

BS EN ISO/IEC 17025:2017

General requirements for the competence of testing and calibration laboratories.

ISO 6474-1:2019

Implants for surgery — Ceramic materials — Part 1: Ceramic materials based on high purity alumina