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Preparation of graded porous titanium coatings on titanium implant materials by plasma spraying

2000; Wiley; Volume: 52; Issue: 2 Linguagem: Inglês

10.1002/1097-4636(200011)52

1097-4636

Yunzhi Yang, Jiading Tian, Jiameng Tian, Z. Q. Chen, Xiaojuan Deng, D. H. Zhang,

Advanced materials and composites

Graded porous titanium coatings have been deposited on titanium substrates for dental implants by plasma spraying in an argon atmosphere. X-ray diffraction (XRD), scanning electron microscopy (SEM), surface roughness measurement, and tensile strength tests were performed on graded porous coatings. The results showed that Ti3O5 was formed in the outermost surface of the porous coatings due to oxidation. The graded porous coatings consisted of three layers. The outer layer was full of macropores with a surface roughness of approximately 100 μm. The diameter of many macropores reached and even surpassed 150 μm, which could be beneficial for tissue to grow into the coating. The middle layer consisted of a mixture of micropores and macropores. The inner layer was a very dense and tight interface layer that included mechanical, physical, and metallurgical bonding. In tensile strength tests, testing bars peeled off the coatings, because the adhesive agent fractured, but the coatings remained intact. © 2000 John Wiley & Sons, Inc. J Biomed Mater Res, 52, 333–337, 2000.