Detection method and test device for catalytic properties of heatproof material based on emission spectrum

Abstract

The invention provides a detection method and a test device for catalytic properties of a heatproof material based on an emission spectrum. The test device comprises a plasma power supply, an air inlet valve, an infrared temperature measurement window, a double-colorimetric thermodetector, an emission piston, an induction heating power supply, a reaction cavity, a resistance vacuum gauge, a vacuum flange, an induction coil, a zirconium oxide support frame, a single-shaft electric stepping machine, a long-focus focusing lens and a short-focus focusing lens. According to an 'atom-dissipation' laboratory representation method based on emission spectrum diagnosis disclosed by the invention, the disturbance of the surface of the material to gas-phase atoms is quantitatively analyzed by an actinic ray strength method, and the recombination coefficient of the gas-phase atoms at the surface of the material is calculated according to mathematic models of gas-phase diffusion and object surface atomic mass conservation conditions. The test device has the advantages that the operation is simple; based on a catalytic mechanism and by virtue of an emission spectrum diagnosis technique, the surface catalysis coefficients of conductive heatproof materials in a temperature range of 600-3000 DEG C can be obtained through measuring the concentration change of oxygen atoms at the surfaces of the materials to represent the surface catalytic properties of the materials based on catalysis principles and diffusion equations.

Description

technical field [0001] The invention relates to the technical field of material detection, in particular to a detection method and a test device for the catalytic properties of heat-resistant materials based on emission spectra. Background technique [0002] Hypersonic vehicles are different from previous reentry vehicles. The new generation of vehicles represented by transatmospheric vehicles, gliding vehicles, jumping missiles, and hypersonic cruise missiles will fly for a long time within the altitude range of 40km to 80km. The service environment makes the head of the aircraft form a strong shock wave, and the air will be heated to a very high temperature by the shock wave, resulting in the vibration excitation, dissociation, and even ionization of the air molecules, making the air flow around the hypersonic aircraft in a chemical non-equilibrium state, and It leads to complex physical and chemical reactions on the surface materials of the body. Aerodynamic physical eff...

AI Technical Summary

Problems solved by technology

[0003] The flight verification test and ground simulation test technology are the most important means to evaluate and characterize the surface catalytic properties of heat-resistant materials, and to analyze hypersonic aerodynamic thermal loads and thermal protection design. However, the high cost and low reliability of flight tests seriously restrict the performance of heat-resistant materials. For the evaluation of material surface catalytic properties, the evaluation technology of material surface catalytic properties based on wind tunnel equipment has problems such as high operating costs, state parameters that cannot be changed independently, small adjustable range, and many interference factors that require flow field reconstruction. It is necessary to carry out large-scale It is difficult to evaluate the catalytic properties of the surface of heat-resistant materials

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