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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 poor adhesion of oxide film and affecting titanium-ceramic bonding

Inactive Publication Date: 2013-05-01
BEIJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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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 is used as a boronizing source, 10% KBF is used as a catalyst, 10% SiC is used as an additive, and 1% of the total mass of the above substances is graphite as a reducing agent. Put all the above-mentioned materials into the tank and shake well to form the compound boride. After putting the prepared composite boride into an alumina crucible, the pure titanium sample is embedded in the composite boride. Put the crucible into the tube furnace, use Ar gas to exhaust the air in the tube furnace, and then heat treatment. The heat treatment process is as follows: when the temperature is raised, the temperature is increased from room temperature to 100°C for 60 minutes, from 100°C to 950°C for 120 minutes, and the temperature is 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 cool to room temperature in air. Remove the titanium sample from the composite boride, clean th...

Embodiment 2

[0028] Take 30% Na 2 B 4 O 7 And 40%B 4 C is used as a boronizing source, 15% KBF is used as a catalyst, 15% SiC is used as an additive, and 2% of the total mass of the above substances is graphite as a reducing agent. Put the above-mentioned materials into the tank and shake well to form the composite boride. After putting the prepared composite boride into an alumina crucible, the pure titanium sample is embedded in the composite boride. Put the crucible into the tube furnace, use Ar gas to exhaust the air in the tube furnace, and then heat treatment. The heat treatment process is as follows: when the temperature is raised, the temperature is increased from room temperature to 100°C for 60 minutes, from 100°C to 950°C for 120 minutes, and the temperature is 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 cool to room temperature in air. Remove the titanium sample from the composite boride, clean the ...

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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 porcelain restorations, and relates to a method for surface modification of titanium materials and a method for preparing a titanium-ceramic reaction intermediate mixed layer, which can reduce the porcelain-fired process of titanium materials and improve the bonding strength of titanium and porcelain-fired layers. Background technique [0002] Titanium and its alloys have attracted much attention because of their light weight, good biocompatibility and biological safety, and the price far lower than precious metals. They have been widely used in oral implants, fixed, movable dentures, and complete dentures. Base, artificial joint and internal fixed splint, etc. However, the application of oral titanium restorations, especially titanium porcelain restorations, is limited. This is because the chemical properties of titanium are relatively active and have a high affinity for oxygen. During the high-temperat...

Claims

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Application Information

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Patent Type & Authority Applications(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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