Nd2O3-containing gradient bioactive ceramic coating material and preparation method thereof

Abstract

The invention discloses an Nd2O3-containing gradient bioactive ceramic coating material and a preparation method thereof. The coating material comprises the following raw materials in parts by weight: 0 to 70 parts of titanium powder and 30 to 100 parts of compound ceramic powder, wherein the compound ceramic powder is prepared through the steps of mixing 72 to 80 parts of CaHPO4.2H2O with 28 to 20 parts of CaCO3 so as to obtain 100 parts of ceramic powder, and then adding 0.1 to 0.8 parts of Nd2O3 powder into the obtained ceramic powder. In the invention, because of adding the Nd2O3 powder into the ceramic powder, the ceramic coating has the function of catalyzing the synthesis of hydroxyapatite and beta-calcium phosphate, and compared with the actions of the ceramic powder added with CeO2, La2O3 and Y2O3 powder, a biological ceramic coating prepared by adding Nd2O3 powder has better biocompatibility and biological activity, has the function of anticoagulation and can prevent canceration; meanwhile, compared with the action of the ceramic powder added with CeO2, La2O3 and Y2O3 powder, more micro-pores are formed on the surface of the biological ceramic coating prepared through adding Nd2O3 powder, thereby providing more channels for a bone tissue ingrowth coating.

Description

technical field [0001] The present invention relates to a kind of Nd-containing 2 o 3 A gradient bioactive ceramic coating material and a preparation method thereof belong to the technical field of medical materials. Background technique [0002] Bioceramics is an important part of biomedical materials, and plays an important role in the repair of human hard tissue defects and the reconstruction of lost physiological functions. The preparation technology of bioactive ceramic coatings can be generally divided into two categories: dry method and wet method. The dry method is to carry out various reactions and depositions in the gas phase, such as plasma spraying method, physical vapor deposition method, chemical vapor deposition method method, thermal spraying method, laser cladding method and ion implantation method, etc. The wet method is a technology that uses various reactions in the liquid phase to deposit coatings on the substrate, such as sol-gel method, electrochemi...

AI Technical Summary

Problems solved by technology

At present, the main problems of laser cladding bioceramic coatings are: (1) The narrow-band laser spot used is very small (φ1~3mm), and the overlapping parts and remelting areas are too large, which will cause re-decomposition and amorphization of bioceramics , affecting the uniformity and stability of the coating; (2) The narrow-band laser energy is Gaussian distributed, which is easy to cause a large temperature gradient in the central area of ​​the molten pool, and more cracks will be generated in the coating after the molten pool solidifies and crystallizes; (3 ) The effect of rare earth oxide content on the structure and properties of bioceramic coatings is lack of research

Images