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A recipe for strength

机译:力量的秘诀

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摘要

Nanophase materials — metals or ceramics with very small grain sizes— have been fairly disappointing. It was thought that small grains should result in much harder metals. It turns out that they are harder but also more brittle. We also hoped that ceramics with very small grains would be much stronger but that hasn't really been demonstrated yet. Yet there is still reason to expect that nanometre-scale composite materials might turn out to be better than conventional composites, such as the carbon fibre-epoxy composites used in high-performance aircraft. For example, we could use nanometre-sized fibres to strengthen a polymer matrix, and carbon nanotubes are now available in sufficient quantities to test this idea. When researchers met at a conference in Alaska to discuss the challenge of making nanocomposites, it became clear that inputs from several fields will be needed to make it work.
机译:纳米材料(晶粒很小的金属或陶瓷)一直令人失望。人们认为,小晶粒会导致硬得多的金属。事实证明,它们更难但也更脆。我们还希望晶粒很小的陶瓷能坚固得多,但尚未得到证实。然而,仍然有理由期望,纳米级复合材料可能会比常规复合材料更好,例如高性能飞机中使用的碳纤维-环氧树脂复合材料。例如,我们可以使用纳米级的纤维来增强聚合物基体,现在可以使用足够数量的碳纳米管来测试这一想法。当研究人员在阿拉斯加的一次会议上讨论制造纳米复合材料所面临的挑战时,很明显将需要来自多个领域的投入才能使其发挥作用。

著录项

  • 来源
    《Nature》 |1999年第6733期|p.210-211|共2页
  • 作者

    Paul Calvert;

  • 作者单位
  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然科学总论;
  • 关键词

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