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Method for producing gradient wear resistant layer from titanium oxide to titanium nitride on surface of titanium alloy artificial joint head

An artificial joint, titanium alloy technology, applied in metal material coating process, coating, solid diffusion coating and other directions, can solve the problems of low bonding strength between film and substrate, low bonding strength, rough modified surface, etc. Achieve the effect of improving biocompatibility and corrosion resistance, good biocompatibility, and reducing friction coefficient

Inactive Publication Date: 2006-01-04
NANJING UNIV OF SCI & TECH
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Problems solved by technology

For example, Chinese patent CN86 2 02828U discloses a "broad-beam mixed ion implantation titanium alloy artificial total hip joint", the essence of the invention is: use wide-beam mixed ion (N + +N + 2 ), at energy: 50-100KeV, dose: 10 16 -10 18 / cm 2 The titanium alloy is injected vertically within the range, forming a high-hardness TiN thin layer on the surface, which enhances its wear resistance and reduces the wear of cartilage materials (UHMWPE), but the injection layer (0.2-0.3μm) is too shallow, Easy to wear off during use
Literature 2 reported the use of magnetron sputtering technology on Ti and ZrO 2 Surface preparation CN X film (“Carbon nitridefilms on orhopedic substrates”, Diamond and Related Materials, 2000, 9: 1984-1991), improved wettability and reduced friction coefficient, but magnetron sputtering CN X The bonding strength with the matrix is ​​not high, and it is easy to fall off and fail during use
[0003] Due to the shortcomings of the existing surface modification technology: (1) the modified layer is too thin; (2) the bonding strength between the film and the substrate is not high; (3) the modified surface is too rough, etc. Good application in artificial joint heads with high precision requirements

Method used

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  • Method for producing gradient wear resistant layer from titanium oxide to titanium nitride on surface of titanium alloy artificial joint head

Examples

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Effect test

Embodiment 1

[0018] The medical Ti-6Al-4V alloy was selected as the base material, and a multifunctional omnidirectional ion implanter (PII) was used to prepare the Ti-O-Ti-N gradient film. The preparation process was as follows: Step 1: Nitrogen ion implantation: The titanium alloy joint head is ground and polished to the surface roughness Ra 17 / cm 2 ;Injection target temperature: 600~700℃; Vacuum degree 5×10 -2 Pa; microwave power: 100w; pulse frequency: 400Hz; pulse width: 50μS; second step: oxygen ion implantation: re-inject oxygen ions into the sample after nitrogen injection, and the implantation process parameters are: implantation energy: 30~50Kev; implantation dose : 1~5×10 18 / cm 2 ;Injection target temperature: room temperature~100℃; vacuum degree 1.5×10 -1 Pa; microwave power: 100w; pulse frequency: 400Hz; pulse width: 50μS. Ti-O-Ti-N gradient membrane artificial joint can be obtained after two-step ion implantation.

example 2

[0020] The medical Ti-6Al-4V alloy was selected as the base material, and a multifunctional omnidirectional ion implanter (PII) was used to prepare the Ti-O-Ti-N gradient film. The preparation process was as follows: Step 1: Nitrogen ion implantation: The titanium alloy joint head is ground and polished to the surface roughness Ra 17 / cm 2 ;Injection target temperature: 600~700℃; Vacuum degree 5×10 -2 Pa; microwave power: 100w; pulse frequency: 400Hz; pulse width: 50μS; second step: oxygen ion implantation: re-inject oxygen ions into the sample after nitrogen injection, and the implantation process parameters are: implantation energy: 30~50Kev; implantation dose : 5~10×10 18 / cm 2 ;Injection target temperature: room temperature~100℃; vacuum degree 1.5×10 -1 Pa; microwave power: 100w; pulse frequency: 400Hz; pulse width: 50μS. Ti-O-Ti-N gradient membrane artificial joint can be obtained after two-step ion implantation.

example 3

[0022] The medical Ti-6Al-4V alloy was selected as the base material, and a multifunctional omnidirectional ion implanter (PII) was used to prepare the Ti-O-Ti-N gradient film. The preparation process was as follows: Step 1: Nitrogen ion implantation: The titanium alloy joint head is ground and polished to the surface roughness Ra 17 / cm 2 ;Injection target temperature: 600~700℃; Vacuum degree 5×10 -2 Pa; microwave power: 100w; pulse frequency: 400Hz; pulse width: 50μS; second step: oxygen ion implantation: re-inject oxygen ions into the sample after nitrogen injection, and the implantation process parameters are: implantation energy: 30~50Kev; implantation dose : 1~5×10 18 / cm 2 ;Injection target temperature: 200~300℃; Vacuum degree 2.5×10 -1 Pa; microwave power: 100w; pulse frequency: 400Hz; pulse width: 25μS. Ti-O-Ti-N gradient membrane artificial joint can be obtained after two-step ion implantation.

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Abstract

The present invention relates to the method of producing gradient wear resistant layer from titanium oxide to titanium nitride on surface of artificial joint head of titanium alloy. The present invention features the two-step omnibearing ion implantation process to form the gradient titanium oxide-titanium nitride film. After the artificial joint head of titanium alloy is polished to mirror surface, it is implanted first with nitrogen ion at high target temperature of 600-700 deg c in the implanted amount of 1017-1018 / sq cm inside the omnibearing ion implantation machine, and then with high dosage of oxygen ion at target temperature from room temperature to 300 deg c and in the implanted amount of 1018-1019 / sq cm, so as to obtain artificial joint head of titanium alloy with gradient titanium oxide-titanium nitride film. The artificial joint head has in the surface deep gradient film with high bearing capacity, high hardness, high combining strength, excellent lubricating performance and high smoothness.

Description

a technical field [0001] The invention relates to a preparation method of an implant device, in particular to a preparation method of a titanium oxide to titanium nitride gradient wear-resistant layer on the surface of a titanium alloy artificial joint head. Two background technology [0002] Titanium alloys have excellent biocompatibility and have been widely used as implant materials, but are generally not used as artificial joint head materials due to their poor wear resistance. Surface-modified titanium alloy joint head materials have been reported at home and abroad. For example, Chinese patent CN86 2 02828U discloses a kind of "broad beam mixed ion implantation of titanium alloy artificial total hip joint". The essence of the invention is: using wide beam mixed ions (N + +N + 2 ), at energy: 50-100KeV, dose: 10 16 -10 18 / cm 2 The titanium alloy was injected vertically within the range, and a thin layer of TiN with high hardness was formed on the surface, which e...

Claims

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Application Information

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IPC IPC(8): C23C8/36A61L27/30
Inventor 熊党生
Owner NANJING UNIV OF SCI & TECH
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