Preparation of Ceramic, Glass-Ceramic and Glasses for Microstructural Examination

AbstractCandidate products are being evaluated to immobilize the routinely calcined waste at the Idaho Chemical Processing Plant (ICPP). A potential product with minimal volume for immobilizing ICPP high-level waste (HLW) for final disposal is a high-waste-loading and high-density glass-ceramic. Glass-ceramics are formed by Hot Isostatic Pressing (HIPing) the HLW with selected additives, such as SiO2, B2O3, Li2O, Na2O, and Y2O3. Glass-ceramic products have been formed with calcine loa ings up to 80 wt% and densities up to 3.4 g/cm3. Crystalline phases observed in the glass-ceramic products include calcium fluoride, monoclinic and cubic zirconia, calcium- and yttrium-stabilized zirconia, and zircon. An interstitial amorphous phase also exists consisting of the oxides of silicon, aluminum, boron, and alkalis. The glass-ceramic waste forms give leach rates comparable to simulated HLW glass products.

Download Full-text

Materials and articles in contact with food stuffs. Test method for the resistance to microwave heating of ceramic, glass, glass-ceramic or plastic cookware

10.3403/30136048u ◽

2015 ◽

Keyword(s):

Microwave Heating ◽

Glass Ceramic ◽

Test Method ◽

Ceramic Glass

Download Full-text

Friction and wear studies of magnetic thin-film rigid disks with glass-ceramic, glass and aluminum-magnesium substrates

Wear ◽

10.1016/0043-1648(95)06611-x ◽

1995 ◽

Vol 190 (1) ◽

pp. 44-59 ◽

Cited By ~ 40

Author(s):

Bharat Bhushan ◽

Lisheng Yang ◽

Chao Gao ◽

Satyarth Suri ◽

Roger A. Miller ◽

...

Keyword(s):

Thin Film ◽

Glass Ceramic ◽

Friction And Wear ◽

Magnetic Thin Film ◽

Rigid Disks ◽

Ceramic Glass

Download Full-text

Flexural strength of an infused ceramic, glass ceramic, and feldspathic porcelain

Journal of Prosthetic Dentistry ◽

10.1016/s0022-3913(05)80067-8 ◽

1995 ◽

Vol 73 (5) ◽

pp. 411-418 ◽

Cited By ~ 66

Author(s):

Russell A. Giordano ◽

Lionel Pelletier ◽

Stephen Campbell ◽

Richard Pober

Keyword(s):

Flexural Strength ◽

Glass Ceramic ◽

Ceramic Glass ◽

Feldspathic Porcelain

Download Full-text

Preparation and Characterization of LAS Glass Based Materials for Dental Applications

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.702.28 ◽

2016 ◽

Vol 702 ◽

pp. 28-31 ◽

Cited By ~ 1

Author(s):

Silvia Barbi ◽

Monia Montorsi ◽

Consuelo Mugoni ◽

Cristina Siligardi

Keyword(s):

Flexural Strength ◽

Glass Ceramic ◽

Structural Changes ◽

Industrial Process ◽

Ceramic Materials ◽

Ceramic Support ◽

Natural Teeth ◽

Ceramic Glass ◽

Glass Interface ◽

Dental Applications

Glass ceramic materials are widely used in dental application because of their strong similarity with natural teeth. In this study LAS glass ceramic/glass materials were prepared by glazing processing and characterized in terms of mechanical flexural strength. The selected glass ceramic support derives from an industrial process. Different glasses were applied to the glass ceramic support in order to investigate firstly their effect on the glass ceramic/glass interface and secondly how these structural changes are correlated to the flexural strength property. Different thermal cycles were applied to the glass ceramic in order to promote the increasing of mechanical flexural strength. Preliminary results clearly points out that the application of a glass on the support leads to the decrease of the flexural strength if compared to the materials without any coating applied.

Download Full-text

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.

Download Full-text

Microstructural examination of modified yttria stabilized zirconia by EM analytical techniques

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100145558 ◽

1986 ◽

Vol 44 ◽

pp. 842-843

Author(s):

W. W. Davison ◽

R. C. Buchanan

Keyword(s):

Mechanical Properties ◽

Analytical Techniques ◽

Yttria Stabilized Zirconia ◽

Stabilized Zirconia ◽

Transmission Microscopy ◽

Sintering Aid ◽

Densification Temperature ◽

Chemical Inertness ◽

Scanning Transmission ◽

Microstructural Examination

Yttria stabilized zirconia (YSZ) has become a significant technological material due to its high ionic conductivity, chemical inertness, and good mechanical properties. Temperatures on the order of 1700°C are required, however, to densify YSZ to the degree necessary for good electrical and mechanical properties. A technique for lowering the densification temperature is the addition of small amounts of material which facilitate the formation of a liquid phase at comparatively low temperatures. In this study, sintered microstructures obtained from the use of Al2O3 as a sintering aid were examined with scanning, transmission, and scanning transmission microscopy (SEM, TEM, and STEM).

Download Full-text