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| Title: | High-velocity impact resistance of ZrB₂-SiC |
| Alternate Title: | High-velocity impact resistance of ZrB2-SiC |
| Author (s): | Henderson, Stewart Fahrenholtz, William G. Hilmas, Greg Marschall, Jochen |
| Department/Lab Affiliations: | Energy Research and Development Center Materials Research Center Materials Science & Engineering Virtual Reality & Rapid Prototyping Lab |
| Keywords: | degradation high-velocity resistance zirconium and hafnium diborides |
| Subject Terms: | Silicon carbide. |
| Issue Date: | 2008-03-27 |
| Publisher: | John Wiley & Sons |
| Citation: | Henderson, Stewart, Fahrenholtz, William G., Hilmas, Gregory E., and Marschall, Jochen. "High-Velocity Impact Resistance of ZrB2-SiC.", Mechanical Properties and Performance of Engineering Ceramics II: Ceramic Engineering and Science Proceedings, vol. 27, no. 2, 2008. |
| Abstract: | The high-velocity impact resistance of hot-pressed zirconum diboride with 30 volume percent silicon carbide was studied using a combined experimental and computational approach. Test specimens in the form of 2 mm thick polished disks were impacted with ~0.8 mm diameter tungsten carbide spheres at velocities up to 320 m/s. The intrinsic flexure strength of the specimens was ~1000 MPa. The flexure strength retained by impacted specimens decreased linearly with increasing impact velocity, falling to ~600 MPa at ~290 m/s. Above this threshold velocity, the retained flexure strength fell rapidly, with no measurable retained strength for samples impacted at 320 m/s. The experimental results suggest gradual strength degradation is associated with the formation of shear and sliding faults under the impact zone at moderate impact velocities. The abrupt decrease in strength above 290 m/s is due to cone-crack propagation. Finite element modeling supports the failure mechanism for impact velocities above 290 m/s, but fails to provide insight as to the failure mechanism below this velocity. |
| Type: | Article - Conference proceedings text |
| In Title: | Mechanical Properties and Performance of Engineering Ceramics II: Ceramic Engineering and Science Proceedings |
| Copyright Notice: | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. Pre-print: author can archive; Post-print: author can archive; FULL COPYRIGHT INFORMATION: |
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| title | High-velocity impact resistance of ZrB₂-SiC |
| title.alternative | High-velocity impact resistance of ZrB2-SiC |
| contributor.author | Henderson, Stewart |
| contributor.author | Fahrenholtz, William G. |
| contributor.author | Hilmas, Greg |
| contributor.author | Marschall, Jochen |
| contributor.deptlab | Energy Research and Development Center |
| contributor.deptlab | Materials Research Center |
| contributor.deptlab | Materials Science & Engineering |
| contributor.deptlab | Virtual Reality & Rapid Prototyping Lab |
| subject | degradation |
| subject | high-velocity |
| subject | resistance |
| subject | zirconium and hafnium diborides |
| subject.LCSH | Silicon carbide. |
| date.issued | 2008-03-27 |
| publisher | John Wiley & Sons |
| identifier.citation | Henderson, Stewart, Fahrenholtz, William G., Hilmas, Gregory E., and Marschall, Jochen. "High-Velocity Impact Resistance of ZrB2-SiC.", Mechanical Properties and Performance of Engineering Ceramics II: Ceramic Engineering and Science Proceedings, vol. 27, no. 2, 2008. |
| identifier.pub.URI | |
| description.abstract | The high-velocity impact resistance of hot-pressed zirconum diboride with 30 volume percent silicon carbide was studied using a combined experimental and computational approach. Test specimens in the form of 2 mm thick polished disks were impacted with ~0.8 mm diameter tungsten carbide spheres at velocities up to 320 m/s. The intrinsic flexure strength of the specimens was ~1000 MPa. The flexure strength retained by impacted specimens decreased linearly with increasing impact velocity, falling to ~600 MPa at ~290 m/s. Above this threshold velocity, the retained flexure strength fell rapidly, with no measurable retained strength for samples impacted at 320 m/s. The experimental results suggest gradual strength degradation is associated with the formation of shear and sliding faults under the impact zone at moderate impact velocities. The abrupt decrease in strength above 290 m/s is due to cone-crack propagation. Finite element modeling supports the failure mechanism for impact velocities above 290 m/s, but fails to provide insight as to the failure mechanism below this velocity. |
| type | Article - Conference proceedings |
| type.DCMIType | text |
| rights | This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. |
| rights | Pre-print: author can archive; Post-print: author can archive; |
| rights.URI | |
| rights.URI | |
| relation.isPartOf | Mechanical Properties and Performance of Engineering Ceramics II: Ceramic Engineering and Science Proceedings |
| date.available | 2008-08-14T13:36:34Z |
| identifier.persist.URI |