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.

利用拉曼显微光谱和EBSD-SEM研究了压痕附近石英单晶的形变。激光拉曼显微光谱显示，远离压痕处的石英单晶具有清晰的拉曼光谱，在波数728处有较强的吸收带。206和464 cm-7，这对于完整的α-石英是典型的。清晰的条带随着接近压痕而逐渐移动和加宽。它们在印模的边缘有肩，最后在印模的中心部分分裂成两个亚带。这种拉曼带的形状变化被认为与通过压痕试验在石英晶体内产生的残余应力场有关。残余应力的大小可以从拉曼带的偏移波数估计，并且最大压应力和拉应力被揭示为分别超过2和0.1 GPa，在压痕的中心。SEM-EBSD研究表明，在靠近压痕的六边形区域，Dauphine孪晶在背散射图像中具有特征性的菊池带和对比度印象由于Dauphine双胞胎发生系统相对于压痕的印象，我们得出结论，Dauphine双胞胎在压痕测试过程中发展。

项目成果

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.

Trace element characteristics of the fluid liberated from amphibolite-facies slab: Inference from the metamorphic sole beneath the Oman ophiolite and implication for boninite genesis

• DOI: 10.1016/j.epsl.2005.09.049
• 发表时间: 2005-12-01
• 期刊: EARTH AND PLANETARY SCIENCE LETTERS
• 影响因子: 5.3
• 作者: Ishikawa, T;Fujisawa, S;Masuda, T
• 通讯作者: Masuda, T

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.