Quantification of inhomogeneity in mechanical properties of rocks in nanometer scale

纳米尺度岩石力学性质不均匀性的量化

• 批准号: 16340152
• 负责人: MASUDA Toshiaki
• 金额: $ 9.34万
• 依托单位: Shizuoka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16340152/
• 关键词: quartz; grain boundary; nanoindentation tester; indentation impression; residual stress; Meyer hardness; Berkovich indenter; Raman spectroscopy; 高温硬度; 定荷重変位; ループエネルギー; トパーズ; 方解石; 塑性変形; イスアれき岩; ビグディンれき岩; 点接触変形; ナノメートル

We investigated how quartz single crystal deformes around the indentation impression by using the Raman microspectroscopy and the EBSD-SEM.The laser Raman microspectroscopy revealed that quartz far from the indentation impression exhibit clear Raman spectra with strong bands at wavenumbers of 728. 206 and 464 cm-7 which are typical for intact a-quartz. The clear bands gradually shift and broaden with approaching to the indentation impression. They have shoulders at the edge of the impression, and finally split into two subbands at the central part of the impression. Such shape change of the Raman bands is considered to be related to the generated residual stress field within the quartz crystal by the indentation test. The magnitude of the residual stress can be estimated from the shifted wavenumbers of the Raman bands, and the maximum compressive and tensile stresses are revealed to exceed 2 and 0.1 GPa, respectively, at the center of the indentation impression.The SEM-EBSD study revealed that Dauphine twins can be perceived with the characteristic Kikuchi bands and contrasts in the back scattered images in hexagonal areas close to the indentation impression. As Dauphine twins occur systematically with respect to the indented impression, we concluded that Dauphine twins have developed during the indentation test.

我们利用拉曼显微光谱和EBSD-SEM研究了石英单晶在压痕印迹周围的变形情况。激光拉曼显微光谱显示，远离压痕印迹的石英表现出清晰的拉曼光谱，在波数为728、206和464 cm处有强谱带。 -7，这是完整的 a-石英的典型值。随着接近压痕印记，清晰的带逐渐移动并变宽。它们在印模边缘有肩部，最后在印模中央部分分成两个子带。拉曼带的这种形状变化被认为与压痕测试中石英晶体内产生的残余应力场有关。残余应力的大小可以根据拉曼带的位移波数来估计，并且在压痕印记的中心处，最大压应力和拉应力分别超过 2 和 0.1 GPa。 SEM-EBSD 研究表明可以通过特征菊池带和靠近压痕印记的六边形区域的背面散射图像中的对比度来感知多芬双胞胎。由于 Dauphine 双胞胎在压痕印模方面系统地发生，因此我们得出结论，Dauphine 双胞胎是在压痕测试期间发育的。

项目成果

Fracture strength of tourmaline and epidote by three-point bending test : application to microboudi method for estimating absolute magnitude of palaeodifferential stress

通过三点弯曲试验测定电气石和绿帘石的断裂强度：微布迪法在估计古微分应力绝对大小中的应用

• 发表时间: 2006
• 期刊: Journal of Structural Geology 28
• 作者: Kimura;N.;Awaji;H.;Okamoto;M.;Matsumura;Y.;Masuda;T.
• 通讯作者: T.

Reaction progress related to indentation structures at glaucophane/glaucophane contacts in an impure marble from Syros, Greece

与希腊锡罗斯岛不纯大理石中的蓝闪石/蓝闪石接触处的压痕结构相关的反应进展

• 发表时间: 2006
• 期刊: Journal of metamorphic Geology 24
• 作者: Okamoto;A.;Miyake;T.;Masuda;T.
• 通讯作者: T.

Cessation of plastic deformation during exhumation of metamorphic tectonites revealed by microboudinage structures

微布丁格结构揭示变质构造岩折返过程中塑性变形的停止

• 发表时间: 2007
• 期刊: Journal of Structural Geology 29
• 作者: Masuda;T.;Kimura;N.;Okamoto;A.;Miyake;T.;Omori;Y.
• 通讯作者: Y.