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http://dx.doi.org/10.5762/KAIS.2020.21.7.82

A Study on the Change of Burning Rate of Zirconium-Nickel Delay Elements Depending on the Ambient Temperature  

Kim, Ho-Sub (Defense Agency for Technology and Quality)
Lim, Ho Young (Defense Agency for Technology and Quality)
Kang, Yo Han (Defense Agency for Technology and Quality)
Kim, Do Hyun (Hanwha Corporation)
Lee, Geun Woo (Hanwha Corporation)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.21, no.7, 2020 , pp. 82-89 More about this Journal
Abstract
Among the explosives in ammunition, the delay elements, which are used as a retardant, could be influenced by the ambient temperature in the Republic of Korea, where the highest and lowest average annual temperature difference is clear. On the other hand, there has been no domestic research on this. This study examined the linear burning rates of the zirconium-nickel delay elements depending on the ambient temperature in South Korea. The ambient temperature data of South Korea were obtained from the meteorological administration, which was used to set the experimental conditions. The operational time for the K414 fuze was measured by changing the ambient temperature by 10 ℃ from -40 ℃ to 50 ℃. To convert the delay time into the burning rates, the height of the delay element in the K414 fuze body was used. The results indicated that the characteristics of the burning rates for the zirconium-nickel delay element could be estimated as linear, and both the burning rates and the delay time of the zirconium-nickel delay element were 2.73mm/ms and -4.18ms, respectively. This led to an approximately 80 ms delay time difference in the environment where the highest and lowest average annual temperature difference was above 20 ℃. Therefore, the delay time reflecting the ambient temperature should be considered when the test evaluation criteria of zirconium-nickel delay elements are established.
Keywords
Delay Elements; Delay Time; Burning Rates; Zirconium-Nickel Alloy; Pyrotechnics;
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