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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.

Authors:
 [1];  [2];  [3];  [1];  [1];  [1]
  1. Colorado State Univ., Fort Collins, CO (United States)
  2. Colorado State Univ., Fort Collins, CO (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Colorado State Univ., Fort Collins, CO (United States); Pioneer Engineering, Fort Collins, CO (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1509537
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Journal of the Mechanical Behavior of Biomedical Materials
Additional Journal Information:
Journal Volume: 93; Journal Issue: C; Journal ID: ISSN 1751-6161
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Aguirre, Trevor G., Cramer, Corson L., Torres, Vincent P., Hammann, Thomas J., Holland, Troy B., and Ma, Kaka. 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. United States: N. p., 2019. Web. doi:10.1016/j.jmbbm.2019.01.021.
Aguirre, Trevor G., Cramer, Corson L., Torres, Vincent P., Hammann, Thomas J., Holland, Troy B., & Ma, Kaka. 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. United States. doi:10.1016/j.jmbbm.2019.01.021.
Aguirre, Trevor G., Cramer, Corson L., Torres, Vincent P., Hammann, Thomas J., Holland, Troy B., and Ma, Kaka. Wed . "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". United States. doi:10.1016/j.jmbbm.2019.01.021.
@article{osti_1509537,
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},
author = {Aguirre, Trevor G. and Cramer, Corson L. and Torres, Vincent P. and Hammann, Thomas J. and Holland, Troy B. and Ma, Kaka},
abstractNote = {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 m1/2) and flexural strength (79.79 MPa) of HA over previous published values (1.0 MPa m1/2). 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.},
doi = {10.1016/j.jmbbm.2019.01.021},
journal = {Journal of the Mechanical Behavior of Biomedical Materials},
number = C,
volume = 93,
place = {United States},
year = {2019},
month = {5}
}

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This content will become publicly available on May 1, 2020
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