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WK89 Practice for Recommended Material Removal Processes for Advanced Ceramic Test Specimens

Date Initiated: 02-07-2003
Date Deletion Requested: 08-24-2007

1. Scope

1.1 This standard practice covers recommended material removal processes (a.k.a., machining or grinding) for advanced ceramic test specimens. This standard practice is not intended to replace or supercede customary or application-matched machining/grinding practices. Instead,
this standard practice is intended to provide recommended material removal procedures developed from experience and testing. Test specimen geometries addressed in this standard practice include prismatic bar flexure test specimens, flat disk bi-axial flexure test specimen, and
cylindrical tension and compression test specimens. Grinding parameters, including diamond-grit size and material removal rates, are addressed in addition to cutting fluid type and conditions.
1.2 This practice may involve hazardous materials, operations, and equipment. This test method does not purport to address the safety problems associated with its use. It is the responsibility of the user of this practice to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
1.3 This practice is intended primarily for use with advanced ceramics that "macroscopically exhibit" isotropic, homogeneous, continuous behavior. While this practice is intended for use on monolithic advanced ceramics, certain whisker- or particle-reinforced composite ceramics as
well as certain discontinuous fiber-reinforced composite ceramics may also meet these macroscopic behavior assumptions. Generally, continuous fiber ceramic composites (CFCCs) do not macroscopically exhibit isotropic, homogeneous, continuous behavior and application of this practice may not be appropriate.
1.4 Values expressed in this test method are in accordance with the International System of Units (SI) and Practice E 380.