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Preparation method of gradient abrasion-resistant coating containing Ag nano-particles

A wear-resistant coating and nanoparticle technology, applied in the field of surface modification, can solve the problems of instantaneous temperature rise, coating failure, easy cracking of brittle reinforcement phases, etc., to improve bonding, improve interface stress, and improve friction and wear performance. Effect

Active Publication Date: 2018-03-09
KUNMING INST OF PRECIOUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its shortcoming is that this method mainly relies on the brittle Ti with high hardness. 5 Si 3 Hard phases are used to enhance the wear resistance of Ti materials, but under service conditions, especially under heavy load conditions, the brittle reinforced phases are prone to cracking and cause coating failure
The disadvantage of this method is that during the friction process, especially under the condition of dry friction with large load, the instantaneous temperature rise (flash temperature) caused by friction heat in the contact area is very high. It is easy to cause the coating to fail
After retrieving a large amount of literature, there has been no relevant report on the application of surface mechanical grinding treatment, magnetron co-sputtering and thermal oxidation to prepare gradient wear-resistant coatings on the surface of Ti materials.

Method used

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  • Preparation method of gradient abrasion-resistant coating containing Ag nano-particles

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Effect test

Embodiment 1

[0023] The selected raw material is 99.95wt% pure Ti. Firstly, the pure Ti is mechanically polished and ultrasonically cleaned with acetone for 3 minutes; then, the pure Ti is recrystallized and annealed under vacuum at a temperature of 700°C for a treatment time of 4h, vacuum degree is 1x10 -3 Pa; Subsequently, pure Ti is placed on the top of the airtight vacuum container, stainless steel balls are placed at the bottom, and the surface mechanical grinding is carried out to the pure Ti. The number of steel balls is 200, the diameter of the steel balls is 8mm, and the surface mechanical grinding treatment time is 60min. The vibration frequency is 50 Hz; then, the pure Ti is ultrasonically cleaned with acetone for 3 minutes, and the pure Ti is fixed on the sample stage of the dual magnetron sputtering source system. 30mm; double magnetron sputtering source system, vacuumed to 5x10 -4Pa, followed by Ar gas, the air pressure was adjusted to 0.5Pa, the power was adjusted to 40W, a...

Embodiment 2

[0029] The selected raw material is Ti6Al4V. Firstly, the Ti6Al4V is mechanically polished and ultrasonically cleaned with acetone for 5 minutes; then, the Ti6Al4V is recrystallized and annealed under vacuum at a temperature of 900 °C for 1 h and a vacuum of 3x10 -4 Pa; Subsequently, Ti6Al4V was placed on the top of the airtight vacuum container, stainless steel balls were placed at the bottom, and the surface of Ti6Al4V was mechanically ground. The number of steel balls was 300, the diameter of the steel ball was 8mm, the surface mechanical grinding time was 120min, and the vibration frequency Afterwards, Ti6Al4V was ultrasonically cleaned with acetone for 5 minutes, and Ti6Al4V was fixed on the sample stage of the dual magnetron sputtering source system. Controlled sputtering source system, vacuumed to 6x10 -4 Pa, followed by Ar gas, the air pressure was adjusted to 1.5Pa, the power was adjusted to 90W, and the Ag target with a purity of 99.99wt% and the Ti target with a pur...

Embodiment 3

[0034] The selected raw material is a TiTa alloy containing 20wt% Ta. First, the TiTa alloy is mechanically polished and ultrasonically cleaned with acetone for 3 minutes; then, the TiTa alloy is recrystallized and annealed under vacuum at a temperature of 800 ° C. The time is 2h, the vacuum is 6x10 -4 Pa; Subsequently, the TiTa alloy is placed on the top of the airtight vacuum container, and stainless steel balls are placed at the bottom, and the surface mechanical grinding process is carried out on the TiTa alloy. The number of steel balls is 250, the diameter of the steel ball is 8mm, and the surface mechanical grinding treatment time is 80min. The vibration frequency was 50 Hz; then, the TiTa alloy was ultrasonically cleaned with acetone for 5 minutes, and the TiTa alloy was fixed on the sample stage of the dual magnetron sputtering source system. 50mm; double magnetron sputtering source system, vacuumed to 4x10 -4 Pa, then enter Ar gas, adjust the air pressure to 1Pa, ad...

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Abstract

The invention discloses a preparation method of a gradient abrasion-resistant coating containing Ag nano-particles, and particularly relates to a preparation method of a gradient abrasion-resistant coating containing Ag nano-particles on the surface of a Ti material. The method mainly includes the steps: recrystallization annealing of the Ti material; surface mechanical attrition treatment; reactive magnetron co-sputtering; heat oxidation. According to the method, a high-toughness and high-hardness abrasion-resistant surface layer is acquired by the aid of the Ag nano-particles with good lubrication and toughness and TiO2 with high hardness, the gradient coating is designed and acquired, interfacial stress between the coating and a metal substrate is effectively improved, and bonding of the coating and the substrate is improved, so that friction and abrasion performances of the Ti material can be obviously improved.

Description

technical field [0001] The invention relates to a preparation method of a wear-resistant coating, in particular to a preparation method of a gradient wear-resistant coating containing Ag nanoparticles on the surface of a Ti material, and belongs to the field of surface modification. Background technique [0002] Due to its low density, high specific strength, excellent corrosion resistance, high temperature resistance, non-magnetic properties, and good biocompatibility, Ti materials are widely used in aerospace, marine engineering, petrochemical, medical, sports equipment and other fields. increasingly widespread. However, poor wear resistance, easy abrasion and adhesion of Ti material limit its popularization and application. Surface modification of Ti material to enhance its wear resistance has become a research hotspot in this field. [0003] The interfacial bonding force between the coating and the substrate is crucial to the life of the coating. In order to reduce the...

Claims

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Application Information

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IPC IPC(8): C23C14/02C23C14/16C23C14/35C23C14/58
CPCC23C14/027C23C14/028C23C14/165C23C14/352C23C14/5853C23C14/5873
Inventor 闻明张蕊赵飞王鲁宁谭志龙王传军郭俊梅李艳琼程勇张俊敏
Owner KUNMING INST OF PRECIOUS METALS
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