Crack Propagation Resistance of alpha-Al2O3 Reinforced Pulsed Laser-Deposited Hydroxyapatite Coating on 316 Stainless Steel

    Authors

    S. Bajpai; A. Gupta; S. K. Pradhan; T. Mandal;K. Balani

    Comments

    Authors: contact us about adding a copy of your work at [email protected]

    Abbreviated Journal Title

    Jom

    Keywords

    CARBON NANOTUBE NANOCOMPOSITE; MECHANICAL-PROPERTIES; ALUMINUM-OXIDE; THIN-FILMS; ELECTROPHORETIC DEPOSITION; ABLATION METHOD; PHOSPHATE; BIOCOMPATIBILITY; MICROSTRUCTURE; COMPOSITES; Materials Science, Multidisciplinary; Metallurgy & Metallurgical; Engineering; Mineralogy; Mining & Mineral Processing

    Abstract

    Hydroxyapatite (HA) is a widely used bioceramic known for its chemical similarity with that of bone and teeth (Ca/P ratio of 1.67). But, owing to its extreme brittleness, alpha-Al2O3 is reinforced with HA and processed as a coating via pulsed laser deposition (PLD). Reinforcement of alpha-Al2O3 (50 wt.%) in HA via PLD on 316L steel substrate has shown modulus increase by 4% and hardness increase by 78%, and an improved adhesion strength of 14.2 N (improvement by 118%). Micro-scratching has shown an increase in the coefficient-of-friction from 0.05 (pure HA) to 0.17 (with 50 wt.% Al2O3) with enhancement in the crack propagation resistance (CPR) up to 4.5 times. Strong adherence of PLD HA-Al2O3 coatings (similar to 4.5 times than that of HA coating) is attributed to efficient release of stored tensile strain energy (similar to 17 x 10(-3) J/m(2)) in HA-Al2O3 composites, making it a potential damage-tolerant bone-replacement surface coating.

    Journal Title

    Jom

    Volume

    66

    Issue/Number

    10

    Publication Date

    1-1-2014

    Document Type

    Article

    Language

    English

    First Page

    2095

    Last Page

    2107

    WOS Identifier

    WOS:000344617000017

    ISSN

    1047-4838

    Share

    COinS
     

    Accessibility Statement

    This item was created or digitized prior to April 24, 2027, or is a reproduction of legacy media created before that date. It is preserved in its original, unmodified state specifically for research, reference, or historical recordkeeping. In accordance with the ADA Title II Final Rule, the University Libraries provides accessible versions of archival materials upon request. To request an accommodation for this item, please submit an accessibility request form.