Testing method for atomic oxygen and thermal cycling effect of spacecraft material

Abstract

The invention discloses a testing method for an atomic oxygen and thermal cycling effect of a spacecraft material. The method comprises the following steps: determining working time and a working manner of an atomic oxygen source and a thermal cycling device according to testing requirements; carrying out an atomic oxygen and thermal cycling integrated effect test in a vacuum chamber; recording acting time and test sample temperature; carrying out the thermal cycling and atomic oxygen integrated effect test according to different working time of the atomic oxygen and thermal cycling test. The testing device provided by the invention can be used for estimating a performance degradation condition of the spacecraft material under the atomic oxygen and thermal cycling effect; performance degradation data of the obtained spacecraft material under a space atomic oxygen and thermal cycling environment is obtained.

Description

technical field [0001] The present invention relates to a technical field of spacecraft thermal test, in particular, the present invention relates to a test method for spacecraft material atomic oxygen and thermal cycle effect, which is suitable for ground simulation test and test of spacecraft material space atomic oxygen / thermal cycle effect evaluate. Background technique [0002] Atomic oxygen is one of the most important environmental factors in Low Earth Orbit (LEO). It will cause very fatal damage to exposed components and materials of spacecraft, and affect its service life in orbit. Spacecrafts also experience thermal cycles during their in-orbit operation, and the temperature range is generally between 172K and 566K. Taking the orbital period of 90 minutes in low earth orbit as an example, a spacecraft with a service life of 30 years will undergo 17,520 thermal cycles in orbit. The effect on spacecraft materials is also very huge. Studies have shown that compared ...

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Problems solved by technology

However, due to the differences between the sequential test environment and the actual space environment, the validity of the test results needs to be improved

Simultaneous test means that the same sample is subjected to atomic oxygen and thermal cycle environmental tests at the same time, but in the test, there are low-energy (<0.5eV) oxygen ions instead of atomic oxygen (about 5eV) environment, the thermal cycle temperature range is small, and the details of the test process are different. clear question

At present, there are many types of spacecraft materials and different application occasions. For long-life spacecraft, the combined effect of atomic oxygen and thermal cycle has become an important issue affecting the performance of materials in space. It is urgent to establish corresponding test methods, which cannot guide the ground conduct of the test

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