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Carbon material with thermal spray coating

A technology of thermal spraying and coating, applied in the direction of coating, superimposed layer plating, metal material coating process, etc., can solve the problems of insufficient oxidation resistance and difficulty in suppressing oxidation consumption of carbon materials, and achieve high density Synergistic effect

Active Publication Date: 2017-08-18
TOCALO CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the carbon-silicon carbide composite material disclosed in Patent Document 1 does not have sufficient oxidation resistance when exposed to an atmosphere of 600° C. or higher in an air atmosphere.
That is, it is difficult to suppress the oxidative consumption of the carbon material of the base material during use in a severe environment

Method used

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  • Carbon material with thermal spray coating
  • Carbon material with thermal spray coating
  • Carbon material with thermal spray coating

Examples

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Embodiment

[0043] Hereinafter, the present invention will be specifically described based on examples, but the carbon material having a thermal spray coating layer of the present invention is not limited by the contents of the following examples.

Embodiment 1

[0046] An isotropic graphite material having a bulk density of 1.91 and an average pore radius of 0.6 μm (Toyo Tanso Co., Ltd. product name “HPG-59”) was processed into a size of 50×50×5 mm as a carbonaceous substrate. Then, polyamide-imide resin ["AI-10", manufactured by Ohara Chemical Co., Ltd.] was dissolved in N-methyl-2-pyrrolidone to obtain a 20% solution. Silicon powder [manufactured by Wako Pure Chemical Industries, Ltd.: particle size: 30 to 50 μm] was mixed with this solution to prepare a slurry. At this time, the quantity of silicon powder was prescribed|regulated so that it may be 60 weight part with respect to 100 weight part of polyamide-imide resins. Then, the slurry was applied to the outer surface of the carbonaceous substrate so as to have a thickness of about 3 mm, and then cured at 300° C. in a dryer. Then, after raising the temperature to 1600° C. in a vacuum furnace and maintaining it for 30 minutes, it was cooled and taken out to form a carbide layer co...

Embodiment 2～5

[0051] except as figure 2 As shown, in addition to the surface of the above-mentioned thermal spray coating layer 3, a surface coating layer formed of zirconium (350 μm), yttria-stabilized zirconia (200 μm), mullite (350 μm), or yttrium oxide (350 μm) is formed, respectively. Except for 4, a carbon material was produced in the same manner as in Example 1 above. Furthermore, the above-mentioned top coat layer 4 is formed by thermally spraying various materials by the atmospheric plasma thermal spraying method. The thermal spraying conditions of zirconium, mullite, and yttrium oxide are set as follows: the plasma gas is a mixed gas of argon and hydrogen with a flow rate of 53L / min, the power supply is 40kW, and the material particle size is 10-45μm. The thermal spraying conditions of yttria-stabilized zirconia are set as follows: the plasma gas is a mixed gas of argon and hydrogen with a flow rate of 50L / min, the power supply is 44kW, and the particle size of the material is 1...

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Abstract

An object of the present invention is to provide a carbon material having excellent adhesion between a base material and a coating layer and also excellent oxidation wear resistance. The carbon material of the present invention is characterized by comprising: a carbonaceous substrate; a carbonized layer containing silicon carbide formed on the surface of the carbonaceous substrate, an arithmetic surface roughness Ra of 1 μm or more, and a Vickers hardness HV of 50 or more. , in addition, the penetration depth of the part penetrated from the surface of the above-mentioned carbonaceous substrate is more than 50 μm; and the thermal spray coating layer (3), which is formed on the surface of the carbide layer containing silicon carbide, can also be formed on the above-mentioned thermal spray coating layer The surface set surface coating.

Description

technical field [0001] The present invention relates to a carbon material having a thermally sprayed coating layer excellent in adhesion, corrosion resistance and oxidation consumption resistance on the surface, which can be suitably applied to various rollers made of sintered carbon, metal and glass Melting crucibles, reaction vessels, various batteries and electrodes for electrolysis, flying body structural members, heating elements, etc. Background technique [0002] Conventionally, as a method of compensating for the oxidation resistance and low surface hardness of carbon materials, many coated carbon materials have been disclosed in which a coating layer with high hardness is provided on the surface of the carbon material or a coating layer is provided to prevent contact with oxygen. invention. [0003] For example, Patent Document 1 discloses a method for producing a carbon-silicon carbide composite material, which is characterized in that a carbon base material havin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/89C04B41/90C21D1/00C23C4/06C22C19/05C22C27/06C22C29/02
CPCC04B41/90C22C19/05C22C27/06C04B41/009C04B41/52C23C4/02C23C4/08C23C28/322C23C28/341C23C28/345C21D9/38C21D1/06C21D1/08C21D1/18C21D2251/00C23C4/134C04B35/522C04B41/4539C04B41/455C04B41/5001C04B41/5059C04B41/4527C04B41/51
Inventor 高畠刚大井手雄平折岛毅泉宫正树多田良臣
Owner TOCALO CO LTD