Gradient composite bioactive ceramic coating material and preparation method thereof

Abstract

The invention discloses a gradient composite bioactive ceramic coating material. The gradient composite bioactive ceramic coating material sequentially comprises a pure titanium substrate, an Ag layer, an HA/Ag composite layer and an HA layer from bottom to top. A preparation method of the gradient composite bioactive ceramic coating material comprises the following steps that the surface of a substrate is coated with pure silver paste, and broadband laser cladding is conducted to form the Ag layer on the surface of the substrate; the surface of the Ag layer of the substrate is coated with slurry containing HA and Ag, and broadband laser cladding is conducted to form an HA/Ag composite layer on the surface of the Ag layer of the substrate; and the surface of the HA/Ag composite layer of a sample is coated with the HA slurry, and broadband laser cladding is conducted to complete the preparation of the gradient composite bioactive ceramic coating material. According to the gradient composite bioactive ceramic coating material and the preparation method thereof, by introducing Ag powder, designing a three-layer powder laying scheme and utilizing a multi-layer broadband laser cladding process, HA powder can be cladded on the surface of pure titanium under the lower laser energy density, the gradient composite bioactive ceramic coating forming good metallurgical bonding with a titanium-based material is prepared, and decomposition of HA in a high-temperature environment is reduced.

Description

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AI Technical Summary

Benefits of technology

This patented technology describes different ways for creating a special type of cervicular bone called porous ceramics coatings on implants made of materials like stainless steel or tantalum. These coatings help prevent corrosion caused by acid rain while still allowing blood cells through them. They also enhances osteointegration over other types of metal alloys used instead of titania due to its higher hardness compared to traditional methods. Additionally, these coatings contain specific chemical components which are able to react at least partially without losing effectiveness when exposed to heat above 5000C. Overall, this new method allows for better control over how well the prosthetic device works under various environmental conditions.

Problems solved by technology

This patented technical solution involves modifying surfaces of titania based alloys used in medical applications like hip prosthetic knee joints or dental fillers. By adding hydroxyl apatite onto these modified surfaces, they will be able to create chemically active layers called cementites within their structure without cracking over time due to changes caused from temperature differences across them. These modifications help prevent damage to the underlying alloy structures while improving their overall performance.

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