In the field of medical porous alloy materials, it specifically relates to a porous niobium titanium alloy material and its preparation method, in particular to a porous niobium titanium alloy material for medical implantation and its preparation method, belonging to the field of medical porous alloy materials.
Biological materials, also known as biomedical materials, are mainly used to replace damaged or missing human tissue structure, to achieve the purpose of repairing the appearance and performance of tissues. Niobium and titanium have good mechanical compatibility, strong corrosion resistance and excellent biocompatibility, and are widely used in the field of bone tissue replacement. At present, the mismatch between the elastic modulus of medical titanium alloy implants and human bone is easy to lead to the "stress masking" effect in clinical application. In addition, the low wear resistance of titanium alloy implants in the complex environment of human body restricts the product life, and the above factors ultimately lead to implantation failure. The development of porous niobium alloy can reduce the elastic modulus of alloy implants, avoid the "stress mask" effect, the unique pore structure is conducive to the adhesion and proliferation of osteoblasts, and niobium metal has good wear resistance, so porous niobium alloy has broad prospects for medical application.
The most widely used methods for preparing porous alloys include casting, metal deposition, fiber metallurgy and powder metallurgy. The impregnation method was first applied by the preparation of porous ceramics and glass, and in recent years it has been used more and more for the preparation of porous alloys. Compared with other methods, the impregnation method has the advantages of simple operation, low equipment requirements, high porosity, high controllable degree of pore size, three-dimensional connected porosity similar to human bone, and easy preparation of complex shape implants, which is conducive to the development of personalized implants.
Uniform slurry was prepared by mixing niobium-titanium composite powder with dispersant solution. The ratio between the mass of the niobium-titanium composite powder and the mass of the dispersing agent solution is (5 ~ 9):1, and the mass percentage content of the dispersing agent in the dispersing agent solution is 3 ~ 6%;
