Effects of the addition of boron nitride nanoplate on the fracture toughness, flexural strength, and Weibull Distribution of hydroxyapatite composites prepared by spark plasma sintering

Trevor G. Aguirre; Corson L. Cramer; Vincent P. Torres; Thomas J. Hammann; Troy B. Holland; Kaka Ma

doi:10.1016/j.jmbbm.2019.01.021

Effects of the addition of boron nitride nanoplate on the fracture toughness, flexural strength, and Weibull Distribution of hydroxyapatite composites prepared by spark plasma sintering

Trevor G. Aguirre, Corson L. Cramer, Vincent P. Torres, Thomas J. Hammann, Troy B. Holland, Kaka Ma

Extreme Environment Materials Process

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33 Scopus citations

Abstract

Hydroxyapatite (HA) has inherently low fracture toughness and low flexural strength, thus limiting it from wide scale application as an implant material in the biomedical field. To increase the fracture toughness and flexural strength, HA composites were fabricated by adding boron nitride nanoplatelets (BNNP) as reinforcement. Spark plasma sintering was utilized to achieve fine grain structure. The addition of BNNP facilitated grain size refinement. The BNNP reinforced HA composites exhibited increased fracture toughness (2.3 MPa m ^1/2 ) and flexural strength (79.79 MPa) of HA over previous published values (1.0 MPa m ^1/2 ). Despite that the Weibull Distribution indicated a sacrifice in mechanical reliability, all the composites fabricated in this study showed a low probability of failure and a factor of safety (~ 5.6) that is consistent with that of human bones (~ 6). In addition, the current study provides an approach to statistically design sintering parameters and mechanical loading for fabrication of ceramics.

Original language	English
Pages (from-to)	105-117
Number of pages	13
Journal	Journal of the Mechanical Behavior of Biomedical Materials
Volume	93
DOIs	https://doi.org/10.1016/j.jmbbm.2019.01.021
State	Published - May 2019

Bibliographical note

Publisher Copyright:
© 2019 Elsevier Ltd

Funding

The authors would like to acknowledge the Colorado State University Central Instrument Facility for use of their SEM and XRD and Dr. Donald W. Radford in the Mechanical Engineering Department for use of his metallography and mechanical testing equipment This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

Funders	Funder number
Colorado State University Central Instrument Facility

Keywords

Boron-nitride nanoplates
Fracture toughness
Hydroxyapatite
Spark plasma sintering
Weibull analysis

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10.1016/j.jmbbm.2019.01.021

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Aguirre, T. G., Cramer, C. L., Torres, V. P., Hammann, T. J., Holland, T. B., & Ma, K. (2019). Effects of the addition of boron nitride nanoplate on the fracture toughness, flexural strength, and Weibull Distribution of hydroxyapatite composites prepared by spark plasma sintering. Journal of the Mechanical Behavior of Biomedical Materials, 93, 105-117. https://doi.org/10.1016/j.jmbbm.2019.01.021

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title = "Effects of the addition of boron nitride nanoplate on the fracture toughness, flexural strength, and Weibull Distribution of hydroxyapatite composites prepared by spark plasma sintering",

abstract = " Hydroxyapatite (HA) has inherently low fracture toughness and low flexural strength, thus limiting it from wide scale application as an implant material in the biomedical field. To increase the fracture toughness and flexural strength, HA composites were fabricated by adding boron nitride nanoplatelets (BNNP) as reinforcement. Spark plasma sintering was utilized to achieve fine grain structure. The addition of BNNP facilitated grain size refinement. The BNNP reinforced HA composites exhibited increased fracture toughness (2.3 MPa m 1/2 ) and flexural strength (79.79 MPa) of HA over previous published values (1.0 MPa m 1/2 ). Despite that the Weibull Distribution indicated a sacrifice in mechanical reliability, all the composites fabricated in this study showed a low probability of failure and a factor of safety (~ 5.6) that is consistent with that of human bones (~ 6). In addition, the current study provides an approach to statistically design sintering parameters and mechanical loading for fabrication of ceramics.",

keywords = "Boron-nitride nanoplates, Fracture toughness, Hydroxyapatite, Spark plasma sintering, Weibull analysis",

author = "Aguirre, {Trevor G.} and Cramer, {Corson L.} and Torres, {Vincent P.} and Hammann, {Thomas J.} and Holland, {Troy B.} and Kaka Ma",

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year = "2019",

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doi = "10.1016/j.jmbbm.2019.01.021",

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Aguirre, TG , Cramer, CL, Torres, VP, Hammann, TJ, Holland, TB & Ma, K 2019, 'Effects of the addition of boron nitride nanoplate on the fracture toughness, flexural strength, and Weibull Distribution of hydroxyapatite composites prepared by spark plasma sintering', Journal of the Mechanical Behavior of Biomedical Materials, vol. 93, pp. 105-117. https://doi.org/10.1016/j.jmbbm.2019.01.021

Effects of the addition of boron nitride nanoplate on the fracture toughness, flexural strength, and Weibull Distribution of hydroxyapatite composites prepared by spark plasma sintering. / Aguirre, Trevor G.; Cramer, Corson L.; Torres, Vincent P. et al.
In: Journal of the Mechanical Behavior of Biomedical Materials, Vol. 93, 05.2019, p. 105-117.

Research output: Contribution to journal › Article › peer-review

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AU - Cramer, Corson L.

AU - Torres, Vincent P.

AU - Hammann, Thomas J.

AU - Holland, Troy B.

AU - Ma, Kaka

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N2 - Hydroxyapatite (HA) has inherently low fracture toughness and low flexural strength, thus limiting it from wide scale application as an implant material in the biomedical field. To increase the fracture toughness and flexural strength, HA composites were fabricated by adding boron nitride nanoplatelets (BNNP) as reinforcement. Spark plasma sintering was utilized to achieve fine grain structure. The addition of BNNP facilitated grain size refinement. The BNNP reinforced HA composites exhibited increased fracture toughness (2.3 MPa m 1/2 ) and flexural strength (79.79 MPa) of HA over previous published values (1.0 MPa m 1/2 ). Despite that the Weibull Distribution indicated a sacrifice in mechanical reliability, all the composites fabricated in this study showed a low probability of failure and a factor of safety (~ 5.6) that is consistent with that of human bones (~ 6). In addition, the current study provides an approach to statistically design sintering parameters and mechanical loading for fabrication of ceramics.

AB - Hydroxyapatite (HA) has inherently low fracture toughness and low flexural strength, thus limiting it from wide scale application as an implant material in the biomedical field. To increase the fracture toughness and flexural strength, HA composites were fabricated by adding boron nitride nanoplatelets (BNNP) as reinforcement. Spark plasma sintering was utilized to achieve fine grain structure. The addition of BNNP facilitated grain size refinement. The BNNP reinforced HA composites exhibited increased fracture toughness (2.3 MPa m 1/2 ) and flexural strength (79.79 MPa) of HA over previous published values (1.0 MPa m 1/2 ). Despite that the Weibull Distribution indicated a sacrifice in mechanical reliability, all the composites fabricated in this study showed a low probability of failure and a factor of safety (~ 5.6) that is consistent with that of human bones (~ 6). In addition, the current study provides an approach to statistically design sintering parameters and mechanical loading for fabrication of ceramics.

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Effects of the addition of boron nitride nanoplate on the fracture toughness, flexural strength, and Weibull Distribution of hydroxyapatite composites prepared by spark plasma sintering

Abstract

Bibliographical note

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Keywords

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