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Antifriction and toughening metal/ceramic bionic multilayer-film artificial joint

An artificial joint and multi-layer film technology, applied in metal material coating process, coating, prosthesis and other directions, can solve the problems of low bonding strength between coating and metal matrix, poor biological stability, coating melting and falling off, etc. Improve biocompatibility and resistance to body fluids, improve wettability, and reduce aseptic loosening

Inactive Publication Date: 2012-07-18
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this type of coating is extremely brittle, and there are defects such as low bonding strength between the coating and the metal substrate, poor biological stability, etc., and the coating will melt and fall off under the action of stress and body fluid erosion.
[0004] TiB 2 It is a biological material with good biocompatibility and no toxic side effects, but it is a highly hard and brittle material. On the one hand, it is difficult to deposit on the surface of metal substrates by conventional methods; on the other hand, its brittleness is difficult to overcome, so that limited its clinical use

Method used

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  • Antifriction and toughening metal/ceramic bionic multilayer-film artificial joint
  • Antifriction and toughening metal/ceramic bionic multilayer-film artificial joint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 316L stainless steel alloy is selected as the base material, and the preparation process is as follows: Step 1: process into a suitable artificial joint shape, mechanically grind and polish the ball head part of the joint; Step 2: in ultra-high vacuum magnetron sputtering equipment The growth of multilayer film is carried out in the medium, and the cathode adopts high-purity metal titanium and hot-pressed sintered ceramic TiB 2 As the target, first grow a titanium layer, the process parameters are as follows: sputtering power 50W, working pressure 0.1Pa, substrate heating temperature 250°C; then grow TiB 2 ceramic layer, and ensure TiB 2 It is the outermost layer, and the process parameters are as follows: sputtering power 120W, working pressure 0.4Pa, substrate heating temperature 450°C, substrate negative bias voltage 60V; the total thickness of the multilayer film is 30μm, including 20 cycles in total. The thickness of the titanium layer is 1 μm, TiB 2 The thicknes...

Embodiment 2

[0023] Ni50Ti50 shape memory alloy is selected as the base material, and the preparation process is as follows: the first step: process into a suitable artificial joint shape, mechanically grind and polish the joint ball part; the second step: magnetron sputtering in ultra-high vacuum Multi-layer film growth is carried out in the equipment, and the cathode adopts high-purity metal titanium and hot-pressed sintered ceramic TiB 2 As the target material, first grow a titanium layer, the process parameters are as follows: sputtering power 20W, working pressure 0.15Pa, substrate heating temperature 250°C; then grow TiB 2 ceramic layer, and ensure TiB 2 It is the outermost layer, and the process parameters are as follows: sputtering power 300W, working pressure 0.7Pa, substrate heating temperature 400°C, substrate negative bias voltage 60V; the total thickness of the multilayer film is 5μm, including 10 cycles in total. The thickness of the titanium layer is 100nm, TiB 2 The thick...

Embodiment 3

[0026] Ti6Al4V titanium alloy is selected as the base material, and the preparation process is as follows: the first step: process into a suitable artificial joint shape, mechanically grind and polish the joint ball part; the second step: in the ultra-high vacuum magnetron sputtering equipment The growth of multilayer film is carried out in the medium, and the cathode adopts high-purity metal titanium and hot-pressed sintered ceramic TiB 2 As the target material, first grow a titanium layer, the process parameters are as follows: sputtering power 10W, working pressure 0.2Pa, substrate heating temperature 300°C; then grow TiB 2 ceramic layer, and ensure TiB 2 It is the outermost layer, and the process parameters are as follows: sputtering power 400W, working pressure 0.5Pa, substrate heating temperature 400°C, substrate negative bias 60V; the total thickness of the multilayer film is about 1.65μm, including 15 cycles in total. The thickness of the titanium layer in the period ...

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Abstract

The invention discloses an antifriction and toughening metal / ceramic bionic multilayer-film artificial joint, comprising an artificial joint matrix (1). The artificial joint matrix is made of materials such as stainless steel, nickel-titanium shape memory alloy, medical titanium alloy or cobalt-chromium alloy. The artificial joint is characterized in that a bionic multilayer film grows on the surface of the artificial joint matrix (1) and is formed in the way that soft metal film layers (2) and hard ceramic film layers (3) grow alternatively to each other, and the thickness of the bionic multilayer film ranges from 50nm to 30mum. According to the invention, the soft metal film layers (2) and the hard ceramic film layers (3) are sequentially deposited on the surface of the artificial joint matrix (1) by an ultrahigh vacuum magnetron sputtering method, thus forming the bionic multilayer film which is ordered and is controllable in thickness. The bionic multilayer film is small in layer friction factor, good in bioactivity and strong in fluid corrosion resistance, can effectively buffer damage on a coating by instantaneous impact, remarkably improves biocompatibility and tribology performance of the artificial joint, and reduces tissue reactivity and aseptic loosening of the artificial joint.

Description

technical field [0001] The invention relates to the field of implanted medical devices, in particular to a friction-reducing and toughening metal / ceramic bionic multilayer film artificial joint. Background technique [0002] The clinically used artificial joints are mostly made of biologically inert metal materials, such as stainless steel and titanium alloys. In daily activities, artificial joints are prone to wear and tear under frequent friction. Clinical experiments have found that the accumulation of wear debris in the body can induce a series of adverse biological reactions in the basal cells, leading to osteolysis and aseptic loosening around the prosthesis, which seriously affects the quality and service life of the artificial joint. Therefore, it is of great significance to study new artificial joint materials with wear resistance, good biocompatibility and high cost performance to improve people's quality of life. Metal artificial joints have good mechanical prop...

Claims

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Application Information

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IPC IPC(8): A61L27/40A61L27/30C23C14/35C23C14/14C23C14/06
Inventor 丁红燕周广宏章跃夏木建周长培陈昌佐
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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