Novel design of YIG/MTC heterogeneous joint bonded by glass ceramic after amorphous glass cladding

Amorphous, glass, and glass-ceramic materials practically always include a significant number (more than eight) of crystalline phases, with the contents of the latter ranging from a few wt.% to several hundredths or tenths of wt.%. The study of such materials using the method of X-ray phase analysis faces difficulties, when determining the phase structure. In this work, we will develop a method for the analysis of the diffraction patterns of such materials, when diffraction patterns include X-ray lines, whose intensities are at the noise level. The identification of lines is based on the search for correlations between the experimental and test lines and the verification of the coincidence making use of statistical methods (computer statistics). The method is tested on the specimens of a-quartz, which are often used as standard ones, and applied to analyze lava-like fuel-containing materials from the destroyed Chornobyl NPP Unit 4. It is shown that the developed technique allows X-ray lines to be identified, if the contents of separate phases is not less than 0.1 wt.%. The method also significantly enhances a capability to determine the phase contents quantitatively on the basis of lines with low intensities.

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Study the effect of gamma radiation on the some properties of glass and glass-ceramic immobilize nuclear waste

Iraqi Journal of Physics (IJP) ◽

10.30723/ijp.v11i21.370 ◽

2019 ◽

Vol 11 (21) ◽

pp. 75-83

Author(s):

Asia H. Al-Mashhadani

Keyword(s):

Gamma Radiation ◽

Nuclear Waste ◽

Glass Ceramic ◽

Gamma Ray ◽

Glass Ceramics ◽

X Ray Diffraction ◽

Amorphous Glass ◽

Direct Problems ◽

Strontium Oxides ◽

Strontium Ion

Vitrifications process one of the important methods to immobilize nuclear waste. In this research nuclear waste (Strontium Oxides) with molecular weight (5%) was immobilized by vitrification methods in two types of borosilicate glass (c-type) which are glass and glass-ceramics. To investigate the physical, chemical and mechanical properties of glass and glass-ceramic after immobilize nuclear waste these samples irradiated by gamma ray radiation. Co-60 was used as gamma a irradiation with dose rate 0.38 kGy/hr for different period of time. It’s found that gamma radiation affected the glass and glass-ceramic properties. From phase analysis by the x-ray diffraction for glass-ceramic samples proved that at doses 343kGy change the crystalline glass to amorphous glass. A conclusion from these ionization studies is that the limited magnitude of Strontium ion leaching associated with ionization damage does not appear to pose any direct problems for the safe storage of nuclear waste glass.

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Crystallization sequence of an A1N-Y2O3-SiO2 glass-ceramic

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100143808 ◽

1986 ◽

Vol 44 ◽

pp. 446-447

Author(s):

T.R. Dinger ◽

G. Thomas

Keyword(s):

High Temperature ◽

Glass Ceramic ◽

Crystallization Behavior ◽

High Stress ◽

Crystallization Sequence ◽

Sio2 Glass ◽

Structural Applications ◽

Ceramic Precursors

The use of Si3N4, alloys for high temperature, high stress structural applications has prompted numerous studies of the oxynitride glasses which exist as intergranular phases in their microstructures. Oxynitride glasses have been investigated recently in their bulk form in order to understand their crystallization behavior for subsequent Si3N4 applications and to investigate their worth as glass-ceramic precursors. This research investigates the crystallization sequence of a glass having a normalized composition of Y26Si30Al11 ON11 and lying in the A1N-Y2O3-SiO2 section of the Y-Si-Al-O-N system. Such glasses exist as intergranular phases in the technologically important Y2O3/Al2O3-fluxed Si3N4 alloys.

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