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Preparation method of material with modified titanium surface for enhancing combination strength of titanium porcelain

A technology of surface modification and bonding strength, which is applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., and can solve problems such as affecting titanium-ceramic bonding and poor adhesion of oxide film

Inactive Publication Date: 2015-04-29
BEIJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to aim at the active chemical properties of titanium, which has a very high affinity for oxygen. At the temperature of porcelain fusion, the surface of titanium is easy to form an oxide film with poor adhesion and a brittle titanium-oxygen solid solution phase, which affects the bonding of titanium porcelain. Problem, the present invention provides a boronizing method to make the composite boride react with the titanium substrate to form a boride layer preparation method, which provides an oxidation barrier for pure titanium ceramics, and makes the boronizing layer formed by the reaction react with the boride in the porcelain powder The glass phase forms a chemical bond to improve the bonding strength of titania

Method used

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  • Preparation method of material with modified titanium surface for enhancing combination strength of titanium porcelain
  • Preparation method of material with modified titanium surface for enhancing combination strength of titanium porcelain
  • Preparation method of material with modified titanium surface for enhancing combination strength of titanium porcelain

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Embodiment 1

[0024] Take 20% Na 2 B 4 o 7 and 60%B 4 C as boronizing source, 10% KBF 4 As a catalyst, 10% SiC is used as an additive, and 1% of the total mass of the above-mentioned substances is graphite as a reducing agent. Put all the above materials into a jar and shake well to make a complex boride. After the prepared composite boride was put into an alumina crucible, the pure titanium sample was embedded in the composite boride. Put the crucible into the tube furnace, exhaust the air in the tube furnace with Ar gas, and then heat treatment. The heat treatment process is as follows: when the temperature is raised, the temperature is raised from room temperature to 100°C for 60 minutes, from 100°C to 950°C for 120 minutes, and kept for 50 minutes. ; When cooling down, from 950°C to 400°C for a total of 80 minutes, then stop the heating program and air cool to room temperature. Take the titanium sample out of the composite boride, clean the surface, remove the residue of the compo...

Embodiment 2

[0028] Take 30% Na 2 B 4 o 7 and 40% B 4 C as boronizing source, 15% KBF 4 As a catalyst, 15% SiC is used as an additive, and 2% of the total mass of the above-mentioned substances is graphite as a reducing agent. Put the above materials into the jar and shake well to make a complex boride. After the prepared composite boride was put into an alumina crucible, the pure titanium sample was embedded in the composite boride. Put the crucible into the tube furnace, exhaust the air in the tube furnace with Ar gas and heat treatment. The heat treatment process is as follows: when the temperature is raised, the temperature is raised from room temperature to 100°C for 60 minutes, from 100°C to 950°C for 120 minutes, and kept for 150 minutes. ; When cooling down, from 950°C to 400°C for a total of 80 minutes, then stop the heating program and air cool to room temperature. Take the titanium sample out of the composite boride, clean the surface, remove the residue of the composite b...

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Abstract

The invention relates to a preparation method of a material with a modified titanium surface for enhancing combination strength of titanium porcelain, which belongs to the metal ceramic restoration body technical field. According to the invention, 70-80% of boron source, 10-15% of catalyst and 10-15% of additive are selected to prepare a composite boride, a machinery mixed method is used for uniformly shaking; a pure titanium sample is imbedded in the composite boride, under the Ar gas protection atmosphere, the temperature is kept for 0-150 minutes at 850-1100 DEG C and cooling is carried out, during a process of cooling, in a process from the holding temperature to 400 DEG C, the cooling speed is less than 7 DEG C / min, cooling in furnace is carried out after 400 DEG C, and the residual composite boride on the sample surface is removed after cooling and then porcelain is baked. A boride layer formed on the surface of pure titanium can protect titanium from oxidizing when the porcelain is baked, and can form a chemically bound reaction interface layer. The interface layer is prepared by a boronisation reaction, and can replace the bonding porcelain effect of the porcelain powder, the titanium porcelain bonding strength is enhanced, and the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of metal-ceramic restorations, and relates to a method for modifying the surface of titanium materials and a preparation method for a titanium-ceramic reaction intermediate mixed layer, which can reduce the process flow of titanium-ceramic ceramics and improve the bonding strength of titanium and ceramic layers. Background technique [0002] Metal titanium and its alloys have attracted much attention because of their light weight, good biocompatibility and biosafety, and the price is far lower than that of precious metals. They have been widely used in oral implants, fixed, removable denture restorations, and complete dentures. Base, artificial joints and internal fixed splints, etc. However, the application of oral titanium restorations, especially titanium porcelain restorations, is limited to a certain extent. This is because the chemical properties of titanium are relatively active and have a high affini...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/68
Inventor 李辉刘旭魏琪张祖太韦艳华丁宁孙日超
Owner BEIJING UNIV OF TECH
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