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Method for preparing oxidization ceramic layer on surface of metal substrate and application of method

A metal substrate, surface oxidation technology, applied in the field of medical implant materials, can solve the problems of oxide particle peeling and aggravating wear and so on

Active Publication Date: 2020-10-27
SUZHOU MICROPORT ORTHORECON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in actual use, it is found that the oxide ceramic layer on the surface of zirconium or zirconium alloy prepared in this way will peel off the oxide particles during long-term friction, especially the oxide particles on the sliding surface will further aggravate the wear.

Method used

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  • Method for preparing oxidization ceramic layer on surface of metal substrate and application of method
  • Method for preparing oxidization ceramic layer on surface of metal substrate and application of method
  • Method for preparing oxidization ceramic layer on surface of metal substrate and application of method

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preparation example Construction

[0047] In the method for preparing the oxidized ceramic layer on the surface of the metal substrate provided by the present invention, oxidation treatment is carried out to form the oxidized ceramic layer during the cooling process, on the one hand avoiding the accumulation of thermal stress and internal stress generated by oxidation expansion during the heating process, and on the other hand On the one hand, the volume shrinkage of the metal substrate during the cooling process can partially offset the volume expansion caused by oxidation, reducing the total stress of the oxide ceramic layer. Further, immediate cooling can reduce the temperature of the metal substrate near the surface, increase the strength of the metal substrate, enhance the binding force to the oxide ceramic layer, enhance the ability to withstand internal stress, reduce the release of internal stress, and then reduce the Form holes, micro-cracks, or form wavy undulations and other defects at the O / M interfa...

Embodiment 1

[0060] The metal substrate is a zirconium-niobium alloy containing 2.5wt% niobium.

[0061] The zirconium-niobium alloy was ground and polished as sample 1, and the surface roughness of sample 1 was Ra=0.0101um. Place sample 1 in alcohol and ultrasonically clean it for 10 minutes, then ultrasonically clean it in deionized water for 10 minutes, take it out and dry it.

[0062] The dried sample 1 was placed in an atmosphere furnace, fed with argon gas, and heated to 700°C, and the heating was stopped.

[0063] Introduce a mixture of argon and oxygen into the atmosphere furnace, and control the temperature in the atmosphere furnace to drop at a rate of 10°C / min until the temperature in the atmosphere furnace drops to room temperature (about 25°C), take out sample 1, and measure Its surface roughness Ra=0.0232um. In this embodiment, the flow rate of the mixed gas into the atmosphere furnace is 500ml / min. In terms of volume percentage, the initial content of oxygen in the mixed ...

Embodiment 2

[0069] The metal substrate is a zirconium-niobium alloy containing 2.5wt% niobium.

[0070] The zirconium-niobium alloy was ground and polished as sample 2, and the surface roughness of sample 2 was Ra=0.0136um. Place sample 2 in alcohol and ultrasonically clean it for 10 minutes, then ultrasonically clean it in deionized water for 10 minutes, take it out and dry it.

[0071] The dried sample 2 was placed in an atmosphere furnace, fed with argon gas, and heated to 700°C, and the heating was stopped.

[0072] A mixture of argon and oxygen was introduced into the atmosphere furnace, and the temperature in the atmosphere furnace was controlled to drop at a rate of 5°C / min until the temperature in the atmosphere furnace dropped to 150°C, and sample 2 was taken out. After the sample was cooled to room temperature, the surface roughness Ra=0.0310um was measured. In this embodiment, the flow rate of the mixed gas into the atmosphere furnace is 1000ml / min. In terms of volume percen...

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Abstract

The invention relates to a method for preparing an oxidization ceramic layer on the surface of a metal substrate and application of the method. The method comprises the following steps of heating themetal substrate to a predetermined temperature in an inert atmosphere and stopping heating; and cooling the metal substrate while introducing a mixed gas to perform oxidation treatment on the metal substrate in order to form the oxidization ceramic layer on the surface of the metal substrate, wherein the mixed gas comprises oxygen and an inert gas, and the content of the oxygen in the mixed gas rises with the decrease of the temperature. According to the method, the oxidation ceramic layer is formed on the surface of the metal substrate, the internal stress generated by the metal substrate canbe reduced, the bearing capacity of the metal substrate on the internal stress is improved, the release of the internal stress is reduced, the defects generated by the oxidization ceramic layer can be reduced, and the quality of the oxidization ceramic layer can be improved.

Description

technical field [0001] The invention relates to the technical field of medical implant materials, in particular to a method and application for preparing an oxidized ceramic layer on the surface of a metal substrate. Background technique [0002] Compared with ceramic materials, when metal materials are used as medical implant substrates, they have good strength, plasticity and are not easy to break. advantage is more pronounced. However, metal materials also have certain disadvantages. Specifically, the surface hardness of metal materials is low, and it is easier to be infiltrated by third-party particles. The surface roughness of metal materials is high, resulting in a large friction coefficient of the sliding surface and poor wear resistance. . Therefore, preparing a ceramic layer on the surface of metal materials is an effective way to obtain a highly wear-resistant surface and avoid the risk of cracking. [0003] A traditional method of forming a ceramic layer on the...

Claims

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Application Information

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IPC IPC(8): C23C8/12A61L27/04A61L27/30A61L27/50
CPCC23C8/12A61L27/047A61L27/306A61L27/50A61L2400/18A61L2420/02A61L2430/24
Inventor 俞天白姚夏睿
Owner SUZHOU MICROPORT ORTHORECON CO LTD
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