Processing Aluminum Oxide\Titanium Diboride Composites for Penetration Resistance

Gilde, Gary; Adams, Jane W.; Burkins, Matthew S.; Motyka, M.; Patel, Parimal; Chin, E.S.C.; Franks, Lisa Prokurat; Sutaria, M. P.; Rigali, Mark J.

doi:10.1002/9780470294680.ch40

“…The density and the elastic modulus of the different composites were measured. The density of the microstructures were equivalent: both the MM composites and the ESD composites had a density of 4.0 g/cm 3 .…”

Section: Resultsmentioning

confidence: 99%

Processing and Ballistic Performance of Al2O3/TiB2 Composites

Gilde¹,

Adams²

2005

1

0

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing the burden, to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY)September 2005 ARL-TR-3658 SPONSOR/MONITOR'S ACRONYM(S) 9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES) SPONSOR/MONITOR'S REPORT NUMBER(S) DISTRIBUTION/AVAILABILITY STATEMENTApproved for public release; distribution is unlimited. SUPPLEMENTARY NOTES ABSTRACTEarly research on Al 2 O 3 /TiB 2 composites focused on exploiting their potential as a low-cost armor ceramic. Limited ballistic data indicated that the microstructure had a dramatic effect on ballistic performance. In some cases, the penetration resistance of Al 2 O 3 /TiB 2 approached that of monolithic TiB 2 ceramics. However, challenges were encountered both in quantifying the microstructural details and fabricating the desired microstructure. The large spread in depth of penetration results for these ceramics, coupled with an insufficient number of samples tested, led to some confusion in accessing the effect microstructure had on the ballistic performance. Our research focused on microstructure control during fabrication and a more thorough ballistic evaluation to correlate microstructure with penetration resistance. iii

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“…In addition, the two-phase Al 2 O 3 +TiB 2 ceramics have shown superior static and dynamic mechanical properties than their monolithic constituents [1][2][3]. The Al 2 O 3 +TiB 2 ceramics have also shown better penetration resistance than monolithic A1 2 O 3 , and the system in which TiB 2 is an interconnected phase surrounding A1 2 O 3 has been shown to exhibit a superior ballistic performance compared with the system in which the two phases are simply uniformly interdispersed [1,4]. Micromechanical simulations have also demonstrated the effect of microstructural bias on failure resistance [5,6].…”

Section: Introductionmentioning

confidence: 99%

Influence of Microstructural Bias on the Hugoniot Elastic Limit and Spall Strength of Two-Phase TiB2+Al2O3 Ceramics

Kennedy¹,

Ferranti²,

Russell³

et al. 2002

AIP Conference Proceedings

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The influence of microstructural bias on the Hugoniot Elastic Limit and spall strength of twophase TiB 2 +Al 2 O 3 ceramics was investigated in this study. The microstructural bias includes differences in phase (grain) size and phase distribution such that in one case a continuous (interconnected) TiB 2 network surrounds the A1 2 O 3 phase, and in another case the TiB 2 and A1 2 O 3 phases are interdispersed and uniformly intertwined with each other. Dynamic compression and tension (spall) properties were measured using plateimpact gas-gun experiments. The measurements used piezoelectric PVDF stress gauges to obtain the loading profile and determine the Hugoniot Elastic Limit, and VISAR interferometry to obtain the spall signal and determine tensile properties. The experimental results reveal that while the strength under dynamic compression (HEL) is more dominantly dependent on the phase size, the tensile spall strength scales with the connectivity of the TiB 2 phase.

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“…The density and the elastic modulus of the different composites were measured. The density of the microstructures were equivalent: both the MM composites and the ESD composites had a density of 4.0 g/cm 3 . The theoretical density for the composite, as determined by the rule of mixtures, was 4.1 g/cm 3 .…”

Section: Resultsmentioning

confidence: 99%

Processing and Ballistic Performance of Al2O3TiB2 Composites

Gilde

¹

,

Adams

²

Advances in Ceramic Armor: A Collection of Papers Presented at the 29th International Conference on Advanced Ceramics and Compo

2

0

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing the burden, to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY)September 2005 ARL-TR-3658 SPONSOR/MONITOR'S ACRONYM(S) 9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES) SPONSOR/MONITOR'S REPORT NUMBER(S) DISTRIBUTION/AVAILABILITY STATEMENTApproved for public release; distribution is unlimited. SUPPLEMENTARY NOTES ABSTRACTEarly research on Al 2 O 3 /TiB 2 composites focused on exploiting their potential as a low-cost armor ceramic. Limited ballistic data indicated that the microstructure had a dramatic effect on ballistic performance. In some cases, the penetration resistance of Al 2 O 3 /TiB 2 approached that of monolithic TiB 2 ceramics. However, challenges were encountered both in quantifying the microstructural details and fabricating the desired microstructure. The large spread in depth of penetration results for these ceramics, coupled with an insufficient number of samples tested, led to some confusion in accessing the effect microstructure had on the ballistic performance. Our research focused on microstructure control during fabrication and a more thorough ballistic evaluation to correlate microstructure with penetration resistance. iii

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Processing Aluminum Oxide\Titanium Diboride Composites for Penetration Resistance

Cited by 5 publications

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Processing and Ballistic Performance of Al2O3/TiB2 Composites

Processing and Ballistic Performance of Al2O3/TiB2 Composites

Influence of Microstructural Bias on the Hugoniot Elastic Limit and Spall Strength of Two-Phase TiB2+Al2O3 Ceramics

Processing and Ballistic Performance of Al2O3TiB2 Composites

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