碳化硼
休克(循环)
材料科学
无定形固体
碳化物
硼
电子显微镜
纳米尺度
断裂(地质)
结晶学
复合材料
纳米技术
化学
光学
有机化学
内科学
物理
医学
作者
Luyang Chen,James W. McCauley,Kevin J. Hemker
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2003-03-07
卷期号:299 (5612): 1563-1566
被引量:487
标识
DOI:10.1126/science.1080819
摘要
High-resolution electron microscope observations of shock-loaded boron carbide have revealed the formation of nanoscale intragranular amorphous bands that occur parallel to specific crystallographic planes and contiguously with apparent cleaved fracture surfaces. This damage mechanism explains the measured, but not previously understood, decrease in the ballistic performance of boron carbide at high impact rates and pressures. The formation of these amorphous bands is also an example of how shock loading can result in the synthesis of novel structures and materials with substantially altered properties.
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