Pressure-induced phase transformations in diamond
Pressure-induced phase transformations in diamond
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DOI：
10.1063/1.368198
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发表时间：
1998-07
影响因子：
3.2
通讯作者：
Y. Gogotsi;A. Kailer;K. Nickel
中科院分区：
文献类型：
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作者：
Y. Gogotsi;A. Kailer;K. Nickel
金刚石在压力下的稳定性和假设的高压相的结构长期以来一直是一个有争议的问题。“钻石会在巨大的压力下变形吗？”尹和科恩在他们的论文标题中问道。50，2006（1983）]试图预测这个问题的答案15年前。在此之前和之后，许多其他科学家试图通过建模和实验来找到答案。然而，金刚石的立方结构在实验上似乎在现代高压技术所能达到的最高静压下是稳定的。我们通过减少加压接触面积而不是增加总载荷来解决这个问题。在实验上，这可以很容易地在压痕测试中使用锋利的金刚石压头。除了静水应力之外，这种测试还产生剪切应力。在这里变形可能实现，这是不可能的，或者将需要更高的压力时，利用只有…
The stability of diamond under pressure and the structure of hypothetical high-pressure phases have been a controversial issue for a long time. “Will diamond transform under megabar pressures?” asked Yin and Cohen in the title of their paper [Phys. Rev. Lett. 50, 2006 (1983)] which attempted to predict an answer to this question 15 years ago. Before and after that, many other scientists tried to find the answer doing both modeling and experiments. However, the cubic structure of diamond seems to be experimentally stable up to the highest static pressures that the modern high-pressure technology can achieve. We addressed the problem by decreasing the contact area of pressurization instead of increasing the total load. Experimentally this can be easily done in indentation tests using a sharp diamond indenter. In addition to hydrostatic stresses, such a test creates shear stresses as well. Here deformations may be realized, which are either impossible or would require much higher pressures when utilizing onl...