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A kind of preparation method of BSAS composite ceramic powder

A composite ceramic and powder technology, applied in coating, metal material coating process, melt spraying and other directions, to achieve the effect of easy to achieve batch preparation, reduce phase transition temperature, and promote nucleation

Active Publication Date: 2016-01-20
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In short, Al has not been seen in the prior art 2 o 3 2SiO2 2 Powder, BaCO 3 Powder, SrCO 3 A report on preparation of BSAS composite powder from powder

Method used

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  • A kind of preparation method of BSAS composite ceramic powder
  • A kind of preparation method of BSAS composite ceramic powder
  • A kind of preparation method of BSAS composite ceramic powder

Examples

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Embodiment 1

[0041] To prepare 0.5BaO-0.5SrO-Al 2 o 3 -2SiO2 2 (BSAS) 10 kg of composite ceramic powder is an example, the converted mole number is 28.52 mol, and Al in the composition 2 o 3 The number of moles is 28.52mol, then the raw material Al(NO 3 ) 3 9H 2 The number of moles of O is 57.04 mol, and the converted mass is 21.4 kg. Weigh 21.4 kg of solid aluminum nitrate and dissolve in deionized water to form a transparent aluminum nitrate solution. SiO in 10 kg BSAS powder 2 The number of moles is 57.04mol, and the converted quality is 3.43 kilograms, and the used tetraethyl orthosilicate ((C 2 h 5 ) 4 SiO 4 ) in SiO 2 The content is 28%, the density is 0.929g / cm 3 , then the mass of ethyl orthosilicate is 12.25 kg, and the volume of ethyl orthosilicate is 13.2L. Measure 13.2L of tetraethyl orthosilicate and 15.4 kg of ethanol, mix the measured tetraethyl orthosilicate and ethanol, add it to the aluminum nitrate solution, stir for 30 minutes to make it fully mixed, and t...

Embodiment 2

[0044] To prepare 0.75BaO-0.25SrO-Al 2 o 3 -2SiO2 2 (BSAS) 10 kg of composite ceramic powder is an example, the converted mole number is 27.55 mol, and Al in the composition 2 o 3 The number of moles is 27.55mol, then the raw material Al(NO 3 ) 3 9H 2 The number of moles of O is 55.1 mol, and the converted mass is 20.7 kg. Weigh 20.7 kg of solid aluminum nitrate and dissolve in deionized water to form a transparent aluminum nitrate solution. SiO in 10 kg BSA powder 2 The number of moles is 55.1mol, and the converted quality is 3.31 kilograms, and the used tetraethyl orthosilicate ((C 2 h 5 ) 4 SiO 4 ) in SiO 2 The content is 28%, the density is 0.929g / cm 3 , then the mass of ethyl orthosilicate is 11.82 kg, and the volume of ethyl orthosilicate is 12.7L. Measure 12.7L of tetraethyl orthosilicate and 14.8 kg of ethanol, mix the measured tetraethyl orthosilicate and ethanol, add it to the aluminum nitrate solution, stir for 30 minutes to make it fully mixed, and th...

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Abstract

The invention discloses a preparation method of a composite ceramic powder material used for an environmental barrier coating. The composite ceramic powder is composed of single phase BSAS (1-xBaO-xSrO-Al2O3-2SiO2, x is more than 0 and less than 1). The obtained BSAS composite ceramic powder has the advantages of easiness for ingredient control, high purity, high crystallinity and low synthesis temperature. The composite ceramic powder can be used for plasma spraying after being subjected to ball milling, agglomeration, pelletizing and high-temperature heat treatment, so that the environmental barrier coating is prepared on the surface of a C / C-SiC composite material, the coating can be used for effectively improving high-temperature water oxygen corrosion resistance performance of a C / C-SiC matrix, is applicable to surface high-temperature protection of other silicon substrate materials, can be used for solving the problem of high-temperature water oxygen corrosion of a silicon substrate composite material and has an important application value.

Description

technical field [0001] The invention relates to a preparation method of a composite ceramic powder for an environmental barrier coating, in particular to a preparation method of a BSAS composite ceramic powder; it belongs to the technical field of preparation of oxide ceramic materials. technical background [0002] Carbon / carbon-silicon carbide (C / C-SiC) composite material is a ceramic matrix composite material with carbon fiber as the reinforcing phase, which combines the superior mechanical properties of fiber reinforcement and the good chemical and thermal stability of ceramics, and has a high specific Strong, high specific modulus, low density, good oxidation resistance, corrosion resistance, excellent mechanical properties and thermophysical properties and other outstanding advantages, it is an ideal high-temperature hot-end components such as high-thrust-to-weight ratio aero-engines, rocket engines and aerospace vehicles. Structural materials. The SiC coating prepare...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/11C04B35/14C04B35/01C04B35/626
Inventor 刘怀菲熊翔王雅雷
Owner CENT SOUTH UNIV
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