| 질화유리의 고속충돌 저항물성 |
| 김창욱, 이형복 |
| 명지대학교 신소재공학과 |
| A Resistance Property Against High Velocity Impact on Oxynitride Glasses |
| Chang-Wook Kim, Hyung-Bock Lee |
| Department of Materials Science and Engineering, Myongji University |
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| ABSTRACT |
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Several oxynitride glasses were fabricated by means of adding $Si_3N_4$ powders as nitrogen source to Ca-Al-Si-O-N (CAS) and Mg-Al-Si-O-N (MAS) glass powders, and heat-treated in graphite crucible at 1600$^{circ}C$ for 1 h. The physical and mechanical properties as well as impact resistance were generally increased and compared with each other. The impact resistance properties of those manufactured glasses were evaluated by DOP (depth of penetration) method which is a way to analyze armor materials. There were two means to be used herein; the copper jet impacted at hyper velocity by exploding K2l5 warhead and tungsten heavy alloy (WHA) impact bar at high velocity by firing in 30 mm solid propellent gun. The impact resistance properties against copper jet were increased and then decreased with increasing nitrogen content, while those against WHA bar were not changed apparently with nitrogen content. |
| Key words:
Oxynitride glass, Mechanical properties, Impact resistance property, Cupper jet, Tungsten impact bar |
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