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Laser surface modification of 316 L stainless steel with bioactive hydroxyapatite
Published in Elsevier Ltd
2013
PMID: 24094165
Volume: 33
   
Issue: 8
Pages: 4594 - 4598
Abstract
Laser-engineered net shaping (LENS™), a commercial additive manufacturing process, was used to modify the surfaces of 316 L stainless steel with bioactive hydroxyapatite (HAP). The modified surfaces were characterized in terms of their microstructure, hardness and apatite forming ability. The results showed that with increase in laser energy input from 32 J/mm2 to 59 J/mm2 the thickness of the modified surface increased from 222 ± 12 μm to 355±6 μm, while the average surface hardness decreased marginally from 403 ± 18 HV0.3 to 372 ± 8 HV0.3. Microstructural studies showed that the modified surface consisted of austenite dendrites with HAP and some reaction products primarily occurring in the inter-dendritic regions. Finally, the surface-modified 316 L samples immersed in simulated body fluids showed significantly higher apatite precipitation compared to unmodified 316 L samples. © 2013 Elsevier B.V. All rights reserved.
About the journal
JournalData powered by TypesetMaterials Science and Engineering C
PublisherData powered by TypesetElsevier Ltd
ISSN09284931
Open AccessNo
Concepts (31)
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    Apatite
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    Biocompatibility
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    Hardness
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    Hydroxyapatite
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    Implants (surgical)
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    Metal implants
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    Phosphate minerals
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    Surface treatment
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    316 L STAINLESS STEEL
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    ADDITIVE MANUFACTURING PROCESS
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    AUSTENITE DENDRITES
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    HYDROXYAPATITE (HAP)
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    Laser engineered net shaping
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    LASER SURFACE MODIFICATION
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    MODIFIED SURFACES
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    Simulated body fluids
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    Stainless steel
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    Biomaterial
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    Article
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    Chemistry
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    Implant
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    Laser
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    LASER SURFACE MODIFICATION
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    LENS™
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    Surface property
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    LASER SURFACE MODIFICATION
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    LENS™
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    Biocompatible materials
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    Durapatite
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    Lasers
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    Surface properties