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Ti-Al-C MAX phase coating and low-temperature phase forming preparation method thereof

A ti-al and coating technology, which is applied in the field of low-temperature phase formation preparation of Ti3AlC2MAX phase coating, can solve the problems of unsatisfactory synthesis conditions, long diffusion coefficient, high synthesis temperature, etc., and achieve a denser, smoother, rougher surface Low density, smooth surface effect

Pending Publication Date: 2022-01-28
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, due to the longer c-axis and complex crystal structure of MAX phase materials, a longer diffusion coefficient is required to distribute elements during the synthesis process, resulting in the synthesis and preparation of MAX phases that are strongly dependent on temperature, and lower temperatures cannot meet the requirements. Synthesis conditions, especially the higher order 312 phase and 413 phase, while the performance of the 211 phase is improved, a higher synthesis temperature is also required

Method used

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  • Ti-Al-C MAX phase coating and low-temperature phase forming preparation method thereof
  • Ti-Al-C MAX phase coating and low-temperature phase forming preparation method thereof
  • Ti-Al-C MAX phase coating and low-temperature phase forming preparation method thereof

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Embodiment 1

[0035] In this embodiment, the base material is 1Cr11Ni2W2MoV stainless steel, and the Ti on the base surface 3 AlC 2 The specific preparation steps of the MAX phase coating are as follows:

[0036] Step 1: Use 400#~2000# SiC sandpaper to polish the surface of 1Cr11Ni2W2MoV stainless steel in sequence, and then use diamond abrasive paste to polish for 20 minutes;

[0037] Step 2: Place the ground and polished 1Cr11Ni2W2MoV stainless steel substrate in acetone for 10 minutes of ultrasonic cleaning, then dry it with cold air and paste it on the sample holder with conductive adhesive for later use.

[0038]Step 3: Place the sample holder pasted with the substrate in the deposition chamber, and wait for the mechanical pump and the molecular pump to evacuate to 3×10 -5 Below Pa, set the chamber temperature to 100°C, feed 34sccm high-purity argon gas into the vacuum chamber, set the linear anode ion source current to 0.2A, and the substrate bias to -200V to etch the surface of th...

Embodiment 2

[0048] In this embodiment, the base material is TC4 titanium alloy, and the Ti on the base surface 3 AlC 2 The specific preparation steps of the MAX phase coating are as follows:

[0049] Step 1: Use 400#~2000# SiC sandpaper to polish the surface of TC4 titanium alloy in sequence, and then use diamond abrasive paste to polish for 20 minutes;

[0050] Step 2: Place the ground and polished TC4 titanium alloy substrate in acetone for 10 minutes of ultrasonic cleaning, then dry it with cold air and paste it on the sample holder with conductive adhesive for later use.

[0051] Step 3: Place the sample holder pasted with the substrate in the deposition chamber, and wait for the mechanical pump and the molecular pump to evacuate to 3×10 -5 Below Pa, set the chamber temperature to 100°C, feed 34 sccm of high-purity argon gas into the vacuum chamber, set the linear anode ion source current to 0.2A, and the substrate bias to -200V to engrave the surface of the TC4 titanium alloy subs...

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Abstract

The invention discloses a low-temperature phase forming preparation method of a Ti3AlC2MAX phase coating, which is characterized by comprising the following steps of sputtering the surface of a matrix by taking a Ti-Al composite target as a sputtering target material and hydrocarbon gas as a reaction gas source and adopting a high-power pulse magnetron sputtering technology at the frequency of 500-1000Hz, the duty ratio of 5-10% and the short pulse of 100-200 microseconds to obtain a TiAlx-C coating, and enabling the TiAlx-C coating to be subjected to heat treatment to obtain the Ti3AlC2MAX phase coating, wherein the heat treatment temperature ranges from 600 DEG C to 700 DEG C. According to the method, the Ti3AlC2MAX phase coating can be prepared at a relatively low temperature. The invention further provides the Ti-Al-C MAX phase coating prepared by adopting the method provided by the invention.

Description

technical field [0001] The invention relates to the technical field of surface treatment, in particular to Ti 3 AlC 2 Low-temperature phase-forming preparation method of MAX phase coating. Background technique [0002] MAX phase materials are a large class of thermodynamically stable, layered high-performance ceramic metal materials with a close-packed hexagonal structure, the general formula is M n+1 AX n , where the M position is a transition metal element, including Ti, Cr, etc., the A position is usually the third or fourth main group element in the periodic table of elements, such as Al, Si, etc., and the X position element is C or N, which can be understood It is a metal carbide or metal nitride nano-layered compound separated by a single layer of A atoms. In general, M-X is bound by strong covalent and ionic bonds, while M-A relies on relatively weak metallic bonds. This unique layered structure and bonding method make the MAX phase have both the excellent prope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/35C23C14/06C23C14/58
CPCC23C14/35C23C14/0635C23C14/5806
Inventor 汪爱英李忠昌王振玉张栋周定伟
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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