研究目的
To study the structure-phase state and the mechanical properties of Al-Si-N magnetron coating and to assess their resistance to the impact of the flow of iron microparticles with the velocity ranging from 5 to 8 km/s.
研究成果
The Al-Si-N coatings enhance the microhardness and elastic properties of quartz glass, with thicker coatings (up to 10 μm) significantly reducing crater density from high-velocity impacts, making them promising for protecting spacecraft optical elements against micrometeoroid damage.
研究不足
The study is limited to specific coating thicknesses (1-10 μm) and iron particle impacts at velocities of 5-8 km/s; it does not explore other materials or impact conditions, and the scalability or long-term durability of the coatings in real-space environments is not addressed.
1:Experimental Design and Method Selection:
The study involved depositing Al-Si-N coatings on quartz glass substrates using pulsed magnetron sputtering to investigate their phase composition, mechanical properties, and resistance to high-velocity particle impacts. X-ray diffraction and energy dispersive X-ray analysis were used for structural and compositional analysis, while nanoindentation measured mechanical properties. Impact tests were conducted using a light-gas gun to simulate micrometeoroid collisions.
2:Sample Selection and Data Sources:
Samples were made from polished quartz KV glass substrates (15 mm diameter, 4 mm thickness). Coatings of varying thicknesses (1-10 μm) were deposited by changing deposition time. Iron microparticles (average size 60 μm) were used for bombardment tests.
3:List of Experimental Equipment and Materials:
Equipment included UVN-05MI 'KVANT' device for magnetron sputtering, ZEISS LEO EVO-50XVP scanning electron microscope with EDX mod. INCA Energy microanalyzer, DRON-7 X-ray device, Nano Hardness Tester (CSM Instruments), and MPH23/8 light-gas gun. Materials included mosaic targets based on aluminum with silicon inserts, nitrogen and argon gases, and iron microparticles.
4:Experimental Procedures and Operational Workflow:
Coatings were deposited at 573 K with a nitrogen to argon ratio of 1:3. X-ray analysis used CoKα radiation. Nanoindentation was performed at 20 mN load. Impact tests involved bombarding samples with iron particles at 5-8 km/s velocity, and crater density was measured post-test using SEM.
5:X-ray analysis used CoKα radiation. Nanoindentation was performed at 20 mN load. Impact tests involved bombarding samples with iron particles at 5-8 km/s velocity, and crater density was measured post-test using SEM. Data Analysis Methods:
5. Data Analysis Methods: Data analysis included X-ray diffraction pattern interpretation using JCPDS database, calculation of microhardness and elastic properties via Oliver-Pharr method, and statistical analysis of crater density from SEM images.
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ZEISS LEO EVO-50XVP
LEO EVO-50XVP
ZEISS
Scanning electron microscope used for imaging and energy dispersive X-ray analysis.
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EDX microanalyzer
INCA Energy
Oxford Instruments
Used for elemental composition analysis via energy dispersive X-ray spectroscopy.
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UVN-05MI
KVANT
KVANT
Used for pulsed magnetron sputtering to deposit Al-Si-N coatings on substrates.
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DRON-7
DRON-7
X-ray device used for structural-phase state investigation of samples.
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Nano Hardness Tester
CSM Instruments
Used to measure microhardness, Young's modulus, and elastic recovery coefficient of coatings.
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MPH23/8
MPH23/8
Light-gas gun used for bombarding samples with high-speed iron microparticles to test impact resistance.
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