Mineralogy the senior phase identification of the sample

In the measurement area by ARGUS imaging detector contrast image acquisition of atoms.Can be inferred from a variety of different gray level there are at least five different phase.

EBSD is a very powerful earth science technology, it can be used for the analysis of the microstructure and phase identification.By measuring the lattice orientation of the particles and the distribution of the facies, EBSD can be used to determine the mineral crystallography preferred direction of the texture (CPO), and understand that the mineral deformation and phase transformation mechanism.

Mineralogy samples is one of the challenges, the sample is more heavy, the main content and vice phase grain size may be considerable differences, when setting up the measurement parameters is easy to miss these vice.However, EBSD can distinguish with similar chemical composition but different crystal structure phase, and EDS can distinguish between a similar crystal structure but different phase chemical composition.EDS and EBSD combination can be measured include multiphase mineralogy of the samples, to overcome these limitations.

In this case, through the collection of EBSD and EDS signal of Oceanic Gabbro samples of 304/305 U1309D (ODP) is analyzed.10 in the samples with 5 different symmetry phase was successful identification and calibration.It is important to note that the phase identification and distinguish can be semi-automatic execution.Both to the SEM test phase to identify and distinguish to sample directly, also can use the saved at the end of the test data offline.For users, the correct analysis, the need to measure.EBSD phase diagram and orientation distribution (figures 3 and 4) shows the software calibration of low and high crystal symmetry phase at the same time.

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Use ARGUS imaging detector ™ contrast image.It reveals the microscopic structure, despite some shade ion milling produced, but the sample has been successfully: by comparison with the direction of the colour coding can clearly see that the internal stress of gold-bonded.

Untreated EBSD phase distribution show that there are 10 samples of the phase.Calibration rate as high as 95%.The black part of the corresponding erosion and pore or cracks.This diagram illustrates the brook software calibration of low and high crystal symmetry phase at the same time.It is important to note that note that grains of diopside clinohypersthene soluble also successfully parsed: although samples with similar characteristics of crystallography, but QUANTAX EBSD calibration algorithm robustness in these phase between no calibration errors.

Quality figure by orientation (along the inclined shaft) stacking chart, shows the competitive calibration samples exist 10 phase.