Microstructural and Mechanical Evaluation of Laser-Assisted Cold Sprayed Bio-ceramic Coatings: Potential Use for Biomedical Applications

Monnamme Tlotleng, Esther Akinlabi, Mukul Shukla, Sisa Pityana

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Bio-composite coatings of 20 wt.%, HAP and 80 wt.%, HAP were synthesized on Ti-6Al-4V substrates using LACS technique. The coatings were produced with a laser power of 2.5 kW, powder-laser spot trailing by 5 s. The coatings were analyzed for the microstructures, microhardness, composition, and bio-corrosion using SEM-EDS, XRD, hardness tester, and Metrohm PGSTAT101 machine. SEM images indicated least pores and crack-free coating with dark-spots of Ti-HAP for the 20 wt.%, HAP as opposed to the 80 wt.%, HAP coating which was solid, porous and finely cracked and had semi-melted Ti-HAP particles. The EDS mappings showed high content of HAP for the 80 wt.%, HAP coating. The diffraction patterns were similar, even though the Ti-HAP peak was broader in the 80 wt.%, HAP coating and the HAP intensities were lower for this coating except for the (004) peak. The hardness values taken at the interface inferred that the 80 wt.%, HAP coating was least bonded. It was possible to conclude that when this phase material increased the hardness dropped considerably. The bio-corrosion tests indicated that the presence of HAP in coating leads to a kinetically active coating as opposed to pure titanium coating. © 2014, ASM International.
Original languageEnglish
Pages (from-to)423-435
JournalJournal of Thermal Spray Technology
Volume24
Issue number3
Early online date04 Dec 2014
DOIs
Publication statusPublished - Feb 2015

Fingerprint

ceramic coatings
Ceramic coatings
coatings
Coatings
Lasers
evaluation
lasers
Hardness
hardness
Energy dispersive spectroscopy
Corrosion
Scanning electron microscopy
corrosion tests
Composite coatings
scanning electron microscopy
Titanium
Powders
Microhardness
Diffraction patterns
test equipment

Bibliographical note

cited By 4

Keywords

  • Ceramic coatings
  • Composite coatings
  • Composite materials
  • Corrosion
  • Cracks
  • Hardness
  • Hydroxyapatite
  • Medical applications
  • Powder coatings
  • Sprayed coatings
  • Titanium, Active coatings
  • Biomedical applications
  • Crack-free coatings
  • Laser power
  • Laser-assisted cold sprays
  • Mechanical evaluation
  • Micro-structural
  • Phase materials, Aluminum coatings

Cite this

Tlotleng, Monnamme ; Akinlabi, Esther ; Shukla, Mukul ; Pityana, Sisa. / Microstructural and Mechanical Evaluation of Laser-Assisted Cold Sprayed Bio-ceramic Coatings: Potential Use for Biomedical Applications. In: Journal of Thermal Spray Technology. 2015 ; Vol. 24, No. 3. pp. 423-435.
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title = "Microstructural and Mechanical Evaluation of Laser-Assisted Cold Sprayed Bio-ceramic Coatings: Potential Use for Biomedical Applications",
abstract = "Bio-composite coatings of 20 wt.{\%}, HAP and 80 wt.{\%}, HAP were synthesized on Ti-6Al-4V substrates using LACS technique. The coatings were produced with a laser power of 2.5 kW, powder-laser spot trailing by 5 s. The coatings were analyzed for the microstructures, microhardness, composition, and bio-corrosion using SEM-EDS, XRD, hardness tester, and Metrohm PGSTAT101 machine. SEM images indicated least pores and crack-free coating with dark-spots of Ti-HAP for the 20 wt.{\%}, HAP as opposed to the 80 wt.{\%}, HAP coating which was solid, porous and finely cracked and had semi-melted Ti-HAP particles. The EDS mappings showed high content of HAP for the 80 wt.{\%}, HAP coating. The diffraction patterns were similar, even though the Ti-HAP peak was broader in the 80 wt.{\%}, HAP coating and the HAP intensities were lower for this coating except for the (004) peak. The hardness values taken at the interface inferred that the 80 wt.{\%}, HAP coating was least bonded. It was possible to conclude that when this phase material increased the hardness dropped considerably. The bio-corrosion tests indicated that the presence of HAP in coating leads to a kinetically active coating as opposed to pure titanium coating. {\circledC} 2014, ASM International.",
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Microstructural and Mechanical Evaluation of Laser-Assisted Cold Sprayed Bio-ceramic Coatings: Potential Use for Biomedical Applications. / Tlotleng, Monnamme; Akinlabi, Esther; Shukla, Mukul; Pityana, Sisa.

In: Journal of Thermal Spray Technology, Vol. 24, No. 3, 02.2015, p. 423-435.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Microstructural and Mechanical Evaluation of Laser-Assisted Cold Sprayed Bio-ceramic Coatings: Potential Use for Biomedical Applications

AU - Tlotleng, Monnamme

AU - Akinlabi, Esther

AU - Shukla, Mukul

AU - Pityana, Sisa

N1 - cited By 4

PY - 2015/2

Y1 - 2015/2

N2 - Bio-composite coatings of 20 wt.%, HAP and 80 wt.%, HAP were synthesized on Ti-6Al-4V substrates using LACS technique. The coatings were produced with a laser power of 2.5 kW, powder-laser spot trailing by 5 s. The coatings were analyzed for the microstructures, microhardness, composition, and bio-corrosion using SEM-EDS, XRD, hardness tester, and Metrohm PGSTAT101 machine. SEM images indicated least pores and crack-free coating with dark-spots of Ti-HAP for the 20 wt.%, HAP as opposed to the 80 wt.%, HAP coating which was solid, porous and finely cracked and had semi-melted Ti-HAP particles. The EDS mappings showed high content of HAP for the 80 wt.%, HAP coating. The diffraction patterns were similar, even though the Ti-HAP peak was broader in the 80 wt.%, HAP coating and the HAP intensities were lower for this coating except for the (004) peak. The hardness values taken at the interface inferred that the 80 wt.%, HAP coating was least bonded. It was possible to conclude that when this phase material increased the hardness dropped considerably. The bio-corrosion tests indicated that the presence of HAP in coating leads to a kinetically active coating as opposed to pure titanium coating. © 2014, ASM International.

AB - Bio-composite coatings of 20 wt.%, HAP and 80 wt.%, HAP were synthesized on Ti-6Al-4V substrates using LACS technique. The coatings were produced with a laser power of 2.5 kW, powder-laser spot trailing by 5 s. The coatings were analyzed for the microstructures, microhardness, composition, and bio-corrosion using SEM-EDS, XRD, hardness tester, and Metrohm PGSTAT101 machine. SEM images indicated least pores and crack-free coating with dark-spots of Ti-HAP for the 20 wt.%, HAP as opposed to the 80 wt.%, HAP coating which was solid, porous and finely cracked and had semi-melted Ti-HAP particles. The EDS mappings showed high content of HAP for the 80 wt.%, HAP coating. The diffraction patterns were similar, even though the Ti-HAP peak was broader in the 80 wt.%, HAP coating and the HAP intensities were lower for this coating except for the (004) peak. The hardness values taken at the interface inferred that the 80 wt.%, HAP coating was least bonded. It was possible to conclude that when this phase material increased the hardness dropped considerably. The bio-corrosion tests indicated that the presence of HAP in coating leads to a kinetically active coating as opposed to pure titanium coating. © 2014, ASM International.

KW - Ceramic coatings

KW - Composite coatings

KW - Composite materials

KW - Corrosion

KW - Cracks

KW - Hardness

KW - Hydroxyapatite

KW - Medical applications

KW - Powder coatings

KW - Sprayed coatings

KW - Titanium, Active coatings

KW - Biomedical applications

KW - Crack-free coatings

KW - Laser power

KW - Laser-assisted cold sprays

KW - Mechanical evaluation

KW - Micro-structural

KW - Phase materials, Aluminum coatings

U2 - 10.1007/s11666-014-0199-6

DO - 10.1007/s11666-014-0199-6

M3 - Article

VL - 24

SP - 423

EP - 435

JO - Journal of Thermal Spray Technology

JF - Journal of Thermal Spray Technology

SN - 1059-9630

IS - 3

ER -