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Preparing method and application of Cr-Al-C series MAX phase coating

A coating, cr-c technology, applied in the field of preparation of Cr-Al-C MAX phase coating, can solve problems affecting battery power, stability and life, achieve excellent corrosion resistance and protection performance, and improve the degree of bonding , Improve the effect of interface conductivity

Active Publication Date: 2020-08-11
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the long-term service of PEMFCs, it is still a big challenge to maintain high corrosion resistance and low interface contact resistance of the coating, which greatly affects the electric power, stability and life of the battery.

Method used

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  • Preparing method and application of Cr-Al-C series MAX phase coating
  • Preparing method and application of Cr-Al-C series MAX phase coating
  • Preparing method and application of Cr-Al-C series MAX phase coating

Examples

Experimental program
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Effect test

Embodiment 1

[0038] In this embodiment, the substrate is a 304 stainless steel bipolar plate used in a proton exchange membrane fuel cell, and the preparation method of the Cr-Al-C system MAX phase coating on the surface of the substrate is as follows:

[0039] (1) Put the substrate after cleaning, degreasing and drying into the cavity, and wait until the vacuum pressure in the cavity is 3.0×10 -5 Below Torr, 100 standard milliliters / minute of argon gas is introduced into the vacuum chamber, the linear anode ion source current is set to 0.3A, the substrate bias voltage is -100V, and the substrate is etched for 30 minutes with ionized argon ions.

[0040] (3) The Cr-C transition layer is deposited by arc ion plating technology, wherein the cathode arc target provides the Cr source, and the gas CH 4 Provide C source, arc target current is 90A, CH 4 The flow rate is 10 standard ml / min, the flow rate of argon gas is 300 standard ml / min, the bias voltage of the substrate is -200V, the deposition...

Embodiment 2

[0055] In this embodiment, the substrate is a 316L stainless steel bipolar plate used in a proton exchange membrane fuel cell, and the preparation method of the Cr-Al-C system MAX phase coating on the surface of the substrate is as follows:

[0056] (1) Put the 316L stainless steel substrate after cleaning, degreasing and drying into the cavity, and wait until the vacuum pressure in the cavity is 3.0×10 -5 Below Torr, 100 standard milliliters / minute of argon gas is fed into the vacuum chamber, the linear anode ion source current is set to 0.3A, the substrate bias voltage is -200V, and the substrate is etched with ionized argon ions for 20 minutes.

[0057] (2) The Cr-C transition layer is deposited by arc ion plating technology, wherein the cathode arc target provides the Cr source, and the gas CH 4 Provide C source, arc target current is 65A, CH 4 The flow rate is 10 standard ml / min, the flow rate of argon gas is 300 standard ml / min, the bias voltage of the substrate is -200...

Embodiment 3

[0061] In this embodiment, the substrate is a 309 stainless steel bipolar plate used in a proton exchange membrane fuel cell, and the preparation method of the Cr-Al-C system MAX phase coating on the surface of the substrate is as follows:

[0062] (1) Put the 309 stainless steel substrate after cleaning, degreasing and drying into the cavity, and wait until the vacuum pressure in the cavity is 3.0×10 - 5 Below Torr, 100 standard milliliters / min of argon gas was introduced into the vacuum chamber, the linear anode ion source current was set to 0.3A, the substrate bias was -150V, and the substrate was etched for 30 minutes with ionized argon ions.

[0063] (3) The Cr-C transition layer is deposited by arc ion plating technology, wherein the cathode arc target provides the Cr source, and the gas CH 4 Provide C source, arc target current is 90A, CH 4 The flow rate is 10 standard ml / min, the flow rate of argon gas is 300 standard ml / min, the bias voltage of the substrate is -150...

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Abstract

The invention discloses a preparing method and application of a Cr-Al-C series MAX phase coating. The method includes the steps of firstly, forming a Cr-C layer on the surface of a base body through deposition by means of electric arc ion sputter deposition, wherein the thickness of the Cr-C layer is 0.5-5 [mu]m; then, forming an Al layer on the surface of the Cr-C layer through deposition by means of magnetic control sputter deposition to obtain an Al / Cr-C coating; and finally, performing heat treatment to obtain the Cr-Al-C series MAX phase coating with (103) crystal face preferred orientation. The coating has high electric conductivity and corrosion resistance; and compared with the prior art, the Cr-Al-C series MAX phase coating prepared through the method improves the interface electric conductivity between the coating and the base body and also improves the corrosion resistance, and has excellent electric conductivity, corrosion resistance and protection property in a severe environment.

Description

technical field [0001] The invention belongs to the technical field of surface engineering protection, and in particular relates to a preparation method and application of a Cr-Al-C system MAX phase coating. Background technique [0002] Unlike conventional transition metal nitrogen / carbides, M n+1 AX n Phase (MAX phase) is a large class of thermodynamically stable layered high-performance ceramic materials with a close-packed hexagonal structure, in which M, A and X are in different positions in the periodic table of elements, where M represents the former transition metal, and A represents IIIA or IVA main group element, X represents C or N. The layers of the MAX phase rely on weak metal bonds between M atoms and A atoms. The unique interatomic bonding method and crystal structure make the MAX phase have excellent properties of both metals and ceramics, such as good electrical conductivity, thermal conductivity, self-healing, small thermal expansion coefficient, excelle...

Claims

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Application Information

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IPC IPC(8): C23C14/35C23C14/32C23C14/18C23C14/06C23C14/02C23C14/58
CPCC23C14/35C23C14/185C23C14/325C23C14/0635C23C14/0021C23C14/5806C23C14/022
Inventor 马冠水汪爱英王振玉郭鹏李昊
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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