Biocompatibility of a functionally graded bioceramic coating made by wide-band laser cladding.
The application of plasma spray is the most popular method by which a metal-bioceramic surface composite can be prepared for the repair of biological hard-tissue, but this method has disadvantages. These disadvantages include poor coating-to-substrate adhesion, low mechanical strength, and brittleness of the coating. In the investigation described in this article, a gradient bioceramic coating was prepared on a Ti-6Al-4V titanium alloy surface using a gradient composite design and wide-band laser cladding techniques. Using a trilayer-structure composed of a substratum, an alloy and bioceramics, the coating was chemically and metallurgically bonded with the substratum. The coating, which contains beta-tricalcium phosphate and hydroxyapatite, showed favorable biocompatibility with the bone tissue and promoted in vivo osteogenesis.
Weidong
Zhu
Z
College of Materials Science and Metallurgy Engineering, Guizhou University, 550003, Guiyang, China. wdzhu@263.net
Qibin
Liu
L
Min
Zheng
Z
Xudong
Wang
W
D000497:Alloys / Q000737:chemistry*; D000818:Animals; D002130:Calcium Phosphates / Q000737:chemistry; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D004285:Dogs; D017886:Durapatite / Q000737:chemistry; D007834:Lasers; D008422:Materials Testing; D016348:Osseointegration; D010012:Osteogenesis / Q000502:physiology; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
D000497:Alloys; D002130:Calcium Phosphates; D020099:Coated Materials, Biocompatible; C485817:beta-tricalcium phosphate; C031462:titanium alloy (TiAl6V4); D017886:Durapatite; D014025:Titanium