Materials Reports  2019, Vol. 33 Issue (Z2): 134-137 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Reveal Thermal Insulation Mechanism of the New Type Erosion Reducing Materialsof (Sm1-XGdX)2Zr2O7 by Detonation Spraying |
| FAN Wei1, TIAN Tian1, CUI Yanfang1, ZHOU Shujuan2
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1 No.52 Research Institute of China Ordnance Industry, Baotou 014034;
2 Baotou Research Institute of Rare Earchs, Baotou 014030 |
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Abstract (Sm1-XGdX)2Zr2O7 was taken as the research object, and microcrystalline wax was used as the carrier.The cooling barrel wall temperature effect of (Sm1-XGdX)2Zr2O7 was investigated through barrel wall temperature test of 14.5 mm ballistic gun.The results showed that the maximum temperature of inner wall was 957 ℃ without loading (Sm1-XGdX)2Zr2O7 sample.The average value of 5 slopes maximum temperature of inner wall was 869 ℃ with a mass ratio of 1∶2 (microcrystalline wax∶(Sm1-XGdX)2Zr2O7 zirconates)sample, the cooling effect was obvious.The effects of (Sm1-XGdX)2Zr2O7 dosage and explosion pressure on the deposited layer were studied through the closed burst scour test, including dispersion and chemical composition.The results showed that the more the (Sm1-XGdX)2Zr2O7 was used, the thicker the sedimentary layer was at 60 MPa and 2 500 K. (Sm1-XGdX)2Zr2O7 was existed and well dispersed in the sedimentary layer.The greater the explosion pressure, the thinner the sedimentary layer under the condition of 1∶2 mass ratio and 2 500 K, (Sm1-XGdX)2Zr2O7 was existed and well dispersed in the sedimentary layer. Finally, we knew the heat insulation mechanism of (Sm1-XGdX)2Zr2O7.It absorbed part of the heat at high temperature,At the same time the air flow formed by the high pressure condition carried the (Sm1-XGdX)2Zr2O7 scours the inner wall of the gun barrel at high speed.Part of (Sm1-XGdX)2Zr2O7 was deposited onto the inner wall, a uniformly distributed sedimentary layer was formed at the interface junction which played the role of heat insulation protection in a comprehensive way.
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Published: 25 November 2019
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| About author:: Wei Fan, received his full-time master’s degree in June 2013 from Dalian University of Technology. He has been working in No.52 Research Institute of China Ordnance Industry since August 2013,focusing on the research of erosion reducing additives for ammunition. |
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