Alloy treatment method based on plasma immersion ion implantation

Abstract

The invention belongs to the field of biomedical materials, and particularly relates to an alloy treatment method based on plasma immersion ion implantation, which comprises the following steps: preparing a porous titanium alloy material with a porous structure; an ultrasonic auxiliary device is loaded, and the titanium alloy material is treated through a micro-plasma oxidation method; carrying out surface functional modification on the titanium alloy material by adopting a plasma immersion ion implantation technology; constructing a bionic titanium alloy material with multiple surface functions; the strength and modulus of the porous titanium alloy can be changed through a method of introducing gaps into the titanium alloy, the mechanical property of the material is effectively regulated and controlled, the mechanical behavior of the material is improved, the material is better matched with surrounding bone tissues, and the titanium alloy material is further subjected to surface functional modification through a plasma immersion ion implantation technology, so that the mechanical property of the material is improved. The modification depth is large, the treatment effect is lasting, the surface modification effect is uniform, and application requirements are closer.

Description

technical field [0001] The invention belongs to the field of biomedical materials, in particular to an alloy treatment method based on plasma immersion ion implantation. Background technique [0002] Titanium and its alloys have many advantages in the application of orthopedic implant materials, such as low density, high strength, good toughness, good biocompatibility, non-toxic, low elastic modulus, good corrosion resistance, low X-ray absorption rate etc., thus occupying an increasingly important position in orthopedic metal materials, and the construction of bionic titanium alloys to replace traditional dense titanium alloys is the development trend of medical titanium alloy implant materials. [0003] A Chinese patent with the publication number CN106282907A discloses a method for preparing a nano-bionic structure by micro-arc discharge on the surface of a titanium alloy, including the following steps: S1, preparing electrolyte; S2, preparing a nano-bionic structure by m...

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Problems solved by technology

[0004] There are still some problems in the method of micro-arc discharge on the surface of titanium alloy to prepare nano-bionic structures. Although titanium alloy has good biocompatibility, it is completely different from natural bone in composition and structure, and is still an inert biomaterial. After the body, it will be covered by a layer of encapsulating fibrous membrane, which cannot form a chemical bond with the bone tissue. It is only a mechanical chimera, which will easily lead to insufficient bonding strength between the implant and the host bone tissue, and the wound will not heal after surgery. and other issues, this method does not treat the titanium alloy material; in the process of putting the titanium alloy into the electrolyte, the conventional micro-arc discharge method is adopted, and the method has not been improved. The concentration at the interface between the metal and the electrolyte solution If the gradient is large, there may be uneven current distribution and excessive growth of local oxide film, which will affect the thickness uniformity and bonding strength of the micro-arc oxidation coating.

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