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A nickel-based alloy ultra-high temperature enamel coating and its preparation method

A nickel-based alloy, ultra-high temperature technology, applied in the field of high temperature enamel coating, can solve the problems of low thermal expansion coefficient, poor thermal shock resistance and low oxidation resistance temperature of enamel coating, and achieve high softening point and thermal shock resistance. Good, high temperature anti-oxidation effect

Inactive Publication Date: 2016-05-18
AIR FORCE UNIV PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these enamel coatings cannot meet the increasing requirements of the gas turbine thrust-to-weight ratio and efficiency for the oxidation protection of nickel-based alloys, which are manifested in the low oxidation resistance temperature, low thermal expansion coefficient of enamel coatings, and poor thermal shock resistance.

Method used

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  • A nickel-based alloy ultra-high temperature enamel coating and its preparation method
  • A nickel-based alloy ultra-high temperature enamel coating and its preparation method
  • A nickel-based alloy ultra-high temperature enamel coating and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0020] In the K38G alloy ultra-high temperature enamel coating of this embodiment, the enamel slurry is composed of the following components by mass: glass frit: 60, alumina-titanium oxide composite ceramic material: 40, kaolin: 6, water: 70.

[0021] The glass frit of the present embodiment is made up of the component of following mass percent: SiO 2 : 42, BaO: 42, CaO: 4, TiO 2 :3, ZnO: 3, CeO 2 :2,CoO:2,K 2 O: 2.

[0022] The molar ratio of the chemical composition of the alumina-titanium oxide composite ceramic material in this embodiment is 1:1.

[0023] The preparation method of the K38G alloy ultra-high temperature enamel coating of the present embodiment is:

[0024] Step 1, sintering alumina and titania with a molar ratio of 1:1 to prepare composite ceramics, pulverizing and grinding to obtain alumina and titania composite ceramic materials with an average particle size of 9.0 μm and a purity of 99.92%;

[0025] Step 2, glass frit (SiO 2 Particle size 8.5μm, pur...

Embodiment 2

[0036] For the K52 alloy ultra-high temperature enamel coating in this embodiment, the enamel slurry is composed of the following components by mass: glass frit: 65, alumina-titanium oxide multi-phase ceramic material: 35, kaolin: 5, water: 65.

[0037] The glass frit of the present embodiment is made up of the component of following mass percent: SiO 2 : 41, BaO: 40, CaO: 5, TiO 2 : 4, ZnO: 3.5, CeO 2 : 3.0, CoO: 1.5, K 2 O: 2.0.

[0038] The molar ratio of the chemical composition of the alumina-titanium oxide composite ceramic material in this embodiment is 1:1.

[0039] The preparation method of the K52 alloy ultra-high temperature enamel coating of the present embodiment is:

[0040] Step 1, sintering alumina and titania with a molar ratio of 1:1 to prepare composite ceramics, pulverizing and grinding to obtain alumina and titania composite ceramic materials with an average particle size of 9.0 μm and a purity of 99.92%;

[0041] Step 2, glass frit (SiO 2 Particle siz...

Embodiment 3

[0052] The K407 alloy ultra-high temperature enamel coating of this embodiment is composed of the following components by mass: glass frit: 63, alumina-titanium oxide composite ceramic material: 37, kaolin: 4, water: 67.

[0053] The glass frit of the present embodiment is made up of the component of following mass percent: SiO 2 : 40, BaO: 40, CaO: 6, TiO 2 : 5, ZnO: 4, CeO 2 : 2, CoO: 1, K 2 O: 2.

[0054] The molar ratio of the chemical composition of the alumina-titanium oxide composite ceramic material in this embodiment is 1:1.

[0055] The preparation method of the K407 alloy ultra-high temperature enamel coating of the present embodiment is:

[0056] Step 1, sintering alumina and titania with a molar ratio of 1:1 to prepare composite ceramics, pulverizing and grinding to obtain alumina and titania composite ceramic materials with an average particle size of 9.0 μm and a purity of 99.92%;

[0057] Step 2, glass frit (SiO 2 Particle size 8.5μm, purity 99.95%, BaO p...

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Abstract

The invention discloses a nickel-based alloy ultra-high temperature enamel coating and a preparation method thereof. The enamel coating comprises the following chemical components in parts by mass: 60-65 parts of glass material, 35-40 parts of aluminum oxide and titanium oxide composite ceramic material, 4-6 parts of kaolin and 65-70 parts of water, wherein the glass material comprises the following chemical components in percentage by mass: 40-42% of SiO2, 40-42% of BaO, 4-6% of CaO, 3-5% of TiO2, 3-4% of ZnO, 2-4% of CeO2, 1-2% of CoO and 2-3% of K2O. The preparation method comprises the following steps: sintering aluminum oxide and titanium oxide in a mole ratio of 1 to 1 to prepare composite ceramic, crushing and grinding, mixing the glass material, the aluminum oxide and titanium oxide composite ceramic material, the kaolin and the water, performing high-energy ball-milling so as to obtain enamel pulp, spraying the enamel pulp onto the surface of a nickel-based alloy, drying, and sintering for 5 minutes at 1190 DEG C, thereby obtaining the ultra-high temperature enamel coating. The nickel-based alloy ultra-high temperature enamel coating disclosed by the invention has the anti-oxidation capability of 100 hours at 1130 DEG C, and has the thermal shock resistance capability when being heated at 1000 DEG C and subsequently cooled in water of 20 DEG C for 15 times.

Description

technical field [0001] The invention belongs to the technical field of high-temperature enamel coatings, and in particular relates to a nickel-based alloy ultra-high-temperature enamel coating and a preparation method thereof. Background technique [0002] Nickel-based alloys are important materials for gas turbine blades. With the improvement of the thrust-to-weight ratio and efficiency of gas turbines, the requirements for the working temperature of nickel-based alloys are also getting higher and higher. The enamel coating is mainly composed of oxides, and its physical properties, mechanical properties and thermal expansion coefficient can be changed through composition control, and the enamel coating has good thermochemical stability and oxidation resistance, and is an effective high-temperature corrosion resistance for nickel-based alloys. and anti-oxidation coating. [0003] Document 1 (Xie Dongbai, Wang Fuhui. High temperature oxidation and hot corrosion resistance o...

Claims

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Application Information

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IPC IPC(8): C03C8/20
Inventor 汪诚华云峰张佩宇柴艳安志斌孙冬沈晓骏
Owner AIR FORCE UNIV PLA
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