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A simplified method for simulating the high-temperature water-oxygen environment of silicon carbide fibers by using sealed quartz tubes

A silicon carbide fiber and quartz tube technology is applied in the field of ceramic fiber materials to achieve high safety and save experimental costs.

Active Publication Date: 2022-02-08
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the above-mentioned problems in the prior art, the object of the present invention is to provide a simplified method for simulating the high-temperature water-oxygen environment of silicon carbide fibers by using quartz sealed tubes, so as to reduce the high cost and existence of the existing technology for simulating the high-temperature water-oxygen environment. security issues and simplify the simulation process with accurate results

Method used

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  • A simplified method for simulating the high-temperature water-oxygen environment of silicon carbide fibers by using sealed quartz tubes
  • A simplified method for simulating the high-temperature water-oxygen environment of silicon carbide fibers by using sealed quartz tubes
  • A simplified method for simulating the high-temperature water-oxygen environment of silicon carbide fibers by using sealed quartz tubes

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Experimental program
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Effect test

Embodiment 1

[0048] Simulated engine combustion environment (P H2O :P O2 :P Ar=14:8:78), the length of the quartz tube is 200mm, the inner diameter of the tube is 18mm, the treatment temperature of the muffle furnace is 1050°C, and when the mass reaction of SiC fiber is 10%, according to the chemical reaction equation (1), (2) and the ideal The gaseous equation calculates that the mass of silicon carbide fiber is 0.0172g, CaCl 2 2H 2 The mass of O is 0.0048g, the partial pressure of oxygen at room temperature is 1.8×103Pa, and the partial pressure of argon at room temperature is 1.75×104Pa. Use an electronic balance to weigh the required silicon carbide fiber and CaCl 2 2H 2 O mass; then CaCl 2 2H 2 O is packed into a small-sized quartz tube with an open end and packed into the selected quartz tube together with the silicon carbide fiber; finally, the quartz tube is vacuumized; finally, argon and oxygen with a certain partial pressure are filled into the quartz tube , and use a hig...

Embodiment 2

[0050] Simulated engine combustion environment (P H2O :P O2 :P Ar =14:8:78), the length of the quartz tube is 200mm, the inner diameter of the tube is 18mm, the treatment temperature of the muffle furnace is 1350°C, and when the mass reaction of SiC fiber is 10%, according to the chemical reaction equation (1), (2) and the ideal The gaseous equation calculates that the mass of silicon carbide fiber is 0.0145g, CaCl 2 2H 2 The mass of O is 0.0040g, the partial pressure of oxygen at room temperature is 1.5×103Pa, and the partial pressure of argon at room temperature is 1.47×104Pa. Use an electronic balance to weigh the required silicon carbide fiber and CaCl 2 2H 2 O mass; then CaCl 2 2H 2 O is packed into a small-sized quartz tube with an open end and packed into the selected quartz tube together with the silicon carbide fiber; finally, the quartz tube is vacuumized; finally, argon and oxygen with a certain partial pressure are filled into the quartz tube , and use a hi...

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Abstract

The invention discloses a simplified method for simulating the high-temperature water-oxygen environment of silicon carbide fibers by using quartz sealed tubes, using relevant chemical equations and ideal gas state equations to quantitatively calculate the required water content, oxygen partial pressure and argon partial pressure; through CaCl 2 2H 2 O provides water molecules, and oxygen and argon are simultaneously sealed into the quartz tube, and then placed in a muffle furnace to simulate a high-temperature water-oxygen environment. This method is easy to operate and can greatly save experimental costs. The simulated high-temperature water-oxygen environment temperature can reach up to 1500 ° C, and can quantitatively study the reaction thermodynamics and kinetics mechanism of silicon carbide fibers at different temperatures and different oxidation degrees.

Description

technical field [0001] The invention relates to the field of ceramic fiber materials, in particular to a simplified method for simulating the high-temperature water-oxygen environment of silicon carbide fibers by using quartz sealed tubes. Background technique [0002] High-performance silicon carbide fiber is an indispensable reinforcement of high-performance ceramic matrix composites, and is also the basic unit of ceramic matrix composites. The mechanical properties of silicon carbide fibers determine the ultimate fracture strength of ceramic matrix composites, especially the mechanical properties of silicon carbide fibers in the high-temperature water-oxygen environment of aeroengines determine the service life of ceramic matrix composites. Therefore, it is very important to study the performance of silicon carbide fibers in high temperature water and oxygen environment to evaluate the safe application of ceramic matrix composites in specific parts of aero-engines. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N25/00
CPCG01N25/00
Inventor 赵子华杨晨曦刘晗马朝利吴素君
Owner BEIHANG UNIV
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