Surface Engineering and Characterization of Laser Deposited Metallic Biomaterials

Novel net shaping technique Laser Engineered Net shaping™ (LENS) laser based manufacturing solution (Sandia Corp., Albuquerque, NM); Laser can be used to deposit orthopedic implant alloys. Ti-35Nb-7Zr-5Ta (TNZT) alloy system was deposited using LENS. The corrosion resistance being an important prerequisite was tested electrochemically and was found that the LENS deposited TNZT was better than conventionally used Ti-6Al-4V in 0.1N HCl and a simulated body solution. A detailed analysis of the corrosion product exhibited the presence of complex oxides which are responsible for the excellent corrosion resistance. In addition, the in vitro tests done on LENS deposited TNZT showed that they have excellent biocompatibility. In order to improve the wear resistance of the TNZT system boride reinforcements were carried out in the matrix using LENS processing. The tribological response of the metal matrix composites was studied under different conditions and compared with Ti-6Al-4V. Usage of Si3N4 balls as a counterpart in the wear studies showed that there is boride pullout resulting in third body abrasive wear with higher coefficient of friction (COF). Using 440C stainless steel balls drastically improved the COF of as deposited TNZT+2B and seemed to eliminate the effect of “three body abrasive wear,” and also exhibited superior wear resistance than Ti-6Al-4V.

Grantor dc:publisher

University of North Texas

Year dc:date

2007

Author dc:creator

• Samuel, Sonia

Contributors dc:contributor

• Banerjee, Rajarshi
• Kaufman, Michael
• Scharf, Thomas W.

• LENS
• biomaterials
• corrosion resistance
• biocompatibility
• Lasers in engineering.
• Coating processes.
• Surfaces (Technology)
• Biomedical materials.

Statement dc:rights

• Public
• Copyright
• Samuel, Sonia
• Copyright is held by the author, unless otherwise noted. All rights reserved.

Language dc:language

English

Identifier

oclc: 176078396
https://digital.library.unt.edu/ark:/67531/metadc3618/
ark: ark:/67531/metadc3618

OAI identifier oai:identifier

info:ark/67531/metadc3618