title: Preparation and characterization of laser cladding wollastonite derived bioceramic coating on titanium alloy.
abstract: The bioceramic coating is fabricated on titanium alloy (Ti6Al4V) by laser cladding the preplaced wollastonite (CaSiO3) powders. The coating on Ti6Al4V is characterized by x-ray diffraction, scanning electron microscopy coupled with energy dispersive spectroscopy, and attenuated total reflection Fourier-transform infrared. The interface bonding strength is measured using the stretching method using an RGD-5-type electronic tensile machine. The microhardness distribution of the cross-section is determined using an indentation test. The in vitro bioactivity of the coating on Ti6Al4V is evaluated using the in vitro simulated body fluid (SBF) immersion test. The microstructure of the laser cladding sample is affected by the process parameters. The coating surface is coarse, accidented, and microporous. The cross-section microstructure of the ceramic layer from the bottom to the top gradually changes from cellular crystal, fine cellular-dendrite structure to underdeveloped dendrite crystal. The coating on Ti6Al4V is composed of CaTiO3, CaO, α-Ca2SiO4, SiO2, and TiO2. After soaking in the SBF solution, the calcium phosphate layer is formed on the coating surface.
authors: Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Shandong, Ji'nan 250061, People's Republic of China and School of Materials Science and Engineering, Shandong University, Shandong, Ji'nan 250061, People's Republic of China.
authors: Huan-cai
authors: HC
authors: Li
authors: Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Shandong, Ji'nan 250061, People's Republic of China and School of Materials Science and Engineering, Shandong University, Shandong, Ji'nan 250061, People's Republic of China.
authors: Dian-gang
authors: DG
authors: Wang
authors: Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Shandong, Ji'nan 250061, People's Republic of China and School of Materials Science and Engineering, Shandong University, Shandong, Ji'nan 250061, People's Republic of China.
authors: Chuan-zhong
authors: CZ
authors: Chen
authors: Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Shandong, Ji'nan 250061, People's Republic of China and School of Materials Science and Engineering, Shandong University, Shandong, Ji'nan 250061, People's Republic of China.
authors: Fei
authors: F
authors: Weng
authors: Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Shandong, Ji'nan 250061, People's Republic of China and School of Materials Science and Engineering, Shandong University, Shandong, Ji'nan 250061, People's Republic of China.
authors: Hua
authors: H
authors: Shi
mesh_terms: D000497:Alloys; D018786:Bone Substitutes / Q000737:chemistry / Q000528:radiation effects*; D017610:Calcium Compounds / Q000737:chemistry / Q000528:radiation effects*; D055598:Chemical Phenomena; D020099:Coated Materials, Biocompatible / Q000737:chemistry / Q000528:radiation effects*; D007834:Lasers; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D017640:Silicates / Q000737:chemistry / Q000528:radiation effects*; D013052:Spectrometry, X-Ray Emission; D017550:Spectroscopy, Fourier Transform Infrared; D013718:Tensile Strength; D014025:Titanium / Q000737:chemistry / Q000528:radiation effects*; D014961:X-Ray Diffraction
chemical_list: D000497:Alloys; D018786:Bone Substitutes; D017610:Calcium Compounds; D020099:Coated Materials, Biocompatible; D017640:Silicates; C031462:titanium alloy (TiAl6V4); D014025:Titanium; C031293:calcium silicate