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Characterization of Hardness and Stiffness of Ceramic Matrix Composites through Instrumented Indentation Test

Shi, Yuan and Koch, Dietmar (2017) Characterization of Hardness and Stiffness of Ceramic Matrix Composites through Instrumented Indentation Test. Leverhulme International Network on Composites for Extreme Temperatures, 30.-31. März 2017, Cambridge, England. (Unpublished)

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Abstract

The determination of the hardness allows useful qualitative conclusions regarding the mechanical properties of materials. It is one of the most economical characterization methods, since this can be carried out with little effort by small plates. However, the characterization of hardness of ceramic matrix composites (CMCs) is a challenge due to their heterogeneous structure and high level of hardness and has thus rarely been investigated. In this work, the experimental procedure and results of determination of the hardness of CMCs using diamond sphere are presented. Several CMCs with different fibers and with porous and dense matrices were investigated. The instrumented indentation testing method was applied with load transducer and displacement sensor. The visual load-unload curve generated during the indentation process was analyzed to determine the hardness and stiffness of the samples. The test load and the number of load-unload-cycles were varied for selected materials in order to provide recommendations for a suitable experimental procedure, which should be applicable to other CMCs.

Item URL in elib:https://elib.dlr.de/116110/
Document Type:Conference or Workshop Item (Speech)
Title:Characterization of Hardness and Stiffness of Ceramic Matrix Composites through Instrumented Indentation Test
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Shi, Yuanyuan.shi (at) dlr.deUNSPECIFIED
Koch, Dietmardietmar.koch (at) dlr.deUNSPECIFIED
Date:March 2017
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Unpublished
Keywords:hardness and stiffness, ceramic matrix Composites, instrumented indentation test
Event Title:Leverhulme International Network on Composites for Extreme Temperatures
Event Location:Cambridge, England
Event Type:Workshop
Event Dates:30.-31. März 2017
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures and Materials
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Ceramic Composite Structures
Deposited By: Shi, Yuan
Deposited On:11 Dec 2017 12:15
Last Modified:11 Dec 2017 12:15

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