ASTM C863

Standard Test Method for Evaluating Oxidation Resistance of Silicon Carbide Refractories at Elevated Temperatures

Steam is used to accelerate the oxidation of SiC refractories at elevated temperatures. ASTM specifies a 500 hour test duration at a temperature between 800°C and 1200°C. The average volume and bulk density changes are measured on three specimens per material.

  PER TEST OF 1 MATERIAL PER TEST OF 3 MATERIALS PER TEST OF 6 MATERIALS
Measurements   $220   $660 $1320
Basic Test Cost $1725 $1725 $1725
Total $1945 $2385 $3045

DOWNLOAD REQUEST FORM »

SIGNIFICANCE AND USE

The oxidation of silicon carbide refractories at elevated temperatures is an important consideration in the application of these refractories. The product of oxidation is amorphous silica or cristobalite, depending upon the temperature at which oxidation takes place. This oxide formation is associated with expansion and degradation of strength. The quantity of water vapor in the atmosphere greatly affects the rate of oxidation.

The test, which creates and measures the expansion, is suitable for guidance in product development and relative comparison in application work where oxidation potential is of concern. The variability of the test is such that it is not recommended for use as a referee test.

1. SCOPE

1.1 This test method covers the evaluation of the oxidation resistance of silicon carbide refractories at elevated temperatures in an atmosphere of steam. The steam is used to accelerate the test. Oxidation resistance is the ability of the silicon carbide (SiC) in the refractory to resist conversion to silicon dioxide (SiO2) and its attendant crystalline growth.

1.2 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 and health practices and determine the applicability of regulatory limitations prior to use.

COPYRIGHT NOTICE

Extracted, with permission, from ASTM C863 Standard Test Method for Evaluating Oxidation Resistance of Silicon Carbide Refractories at Elevated Temperatures, copyright ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428. A copy of the standard may be purchased from ASTM International, phone 610-832-9555, e-mail: service@astm.org, website: www.astm.org.

PURCHASE FULL STANDARD »

View Products by Category:

 

Search
clear

FROM THE BLOG...

Orton Welcomes New General Manager!

The Board of Trustees of the Edward Orton Jr. Ceramic Foundation announces the retirement of its General...

How Kiln Environment will affect a Pyrometric Cone

Those experienced in firing ceramics know that kiln atmosphere can have a major influence on the reaction...

TempTabs: What They Are & How They Work - Watch This Video!

TempTabs are used to measure temperature uniformity, consistency and repeatability in high temperature...