A kind of gradient medical material and its preparation method
A gradient and element technology, which is applied in the fields of pharmaceutical formula, metal material coating technology, medical science, etc., can solve problems such as unfavorable patient rehabilitation, improve anti-bacterial infection ability, improve corrosion resistance, and solve problems with high elastic modulus Effect
Active Publication Date: 2021-07-13
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology
Although the titanium alloy of this invention has a low modulus of elasticity, it contains elements Gd, Fe and Pt that are harmful to the human body. If they exist in the human body for a long time, they will dissolve elements that are harmful to the human body, which is not conducive to the recovery of patients.
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Embodiment 1
[0044] Embodiment 1: the addition of changing Zr element is: (a) 0wt%; (b) 1wt%; (c) 3wt%; (d) 5wt%; (e) 7wt%, determine optimal addition 3wt%, (b) 2wt%; (c) 4wt%; (d) 6wt%; (e) 8wt% to determine the optimum addition 6wt%. Finally, the addition amount of Cu and Zn elements in the change layer is (a) 0.2wt%; (b) 0.3wt%; (c) 0.4wt%, and the optimal addition amount is determined to be 0.4wt%.
[0045] A method for preparing a gradient medical material, characterized in that it comprises the following steps:
[0046] (1) Calculate the mass percentage of each element in the alloy, with TiH 2 , Mo powder, Nb powder, Zr powder and Ta powder as raw materials, according to the designed alloy composition ratio, accurately weigh the elemental metal powder of each element; put the weighed powder into a vacuum stainless steel tank, the ball-to-material ratio is 3:1 , and ball milled at a speed of 180r / min for 600min, ground the mixed material, and passed through a 400-mesh sieve;
[004...
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Abstract
The invention discloses a gradient medical material and a preparation method thereof. On the basis of the Ti‑10Mo‑28Nb alloy ratio, alloy strengthening elements Zr and β Phase stabilizing element Ta, the surface coating of Ti-Mo-Nb-Zr-Ta multi-element alloy is HA or HA-Cu-Zn composite coating. The addition of Zr and Ta can significantly reduce the elastic modulus of the alloy, maintain the strength requirements for in vivo use, improve corrosion resistance, and better meet the needs of titanium alloys implanted into the human body. The surface coating is Ti-10Mo-28Nb-3Zr-6Ta multi-element alloy surface HA or HA-Cu-Zn composite coating. By polishing the surface of Ti‑5Mo‑28Nb‑3Zr‑6Ta alloy; the surface of the alloy is prepared by anodic oxidation method, and then a layer of hydroxyapatite (HA) and Copper (Cu) and zinc (Zn) elements are used to prepare composite biological coatings. The gradient medical material helps to solve the problems of high elastic modulus, poor biological activity, corrosion resistance and antibacterial property of current bone implant materials.
Description
technical field [0001] The invention belongs to the technical field of medical titanium alloy material preparation and surface modification thereof, in particular to a biogradient medical material that reduces the elastic modulus of the titanium alloy matrix and improves the strength, biological activity, corrosion resistance and antibacterial properties of the titanium alloy matrix and preparation method. Background technique [0002] Gradient material refers to the selection of several materials with different properties during the preparation process of the material, and the continuous control of the microscopic elements of the material (including gradient changes in pore size, gradient changes in porosity, and gradient changes in composition), so that the composition of the interface and organization changes continuously. There are many classification methods for gradient materials according to different classification standards. According to the combination of materia...
Claims
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IPC IPC(8): C22C14/00C22C1/05C25D11/26C23C4/134C23C4/06C23C4/04A61L31/02A61L31/08A61L31/14A61L31/16
CPCA61L31/022A61L31/086A61L31/088A61L31/14A61L31/16A61L2300/102A61L2300/404A61L2400/12C22C1/058C22C14/00C23C4/04C23C4/06C25D11/26C23C4/134
Inventor 许莹蔡艳青魏子琰
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY