Corrigendum to “High temperature viscosity of calcium-magnesium-aluminosilicate glass from synthetic sand” [Scripta Mater. 124 (2016) 189–192]

2017 ◽  
Vol 130 ◽  
pp. 298 ◽  
Author(s):  
Valerie L. Wiesner ◽  
Udaya K. Vempati ◽  
Narottam P. Bansal
Keyword(s):  
High Temperature ◽  
Aluminosilicate Glass ◽  
Calcium Magnesium ◽  
Scripta Mater

High temperature viscosity of calcium-magnesium-aluminosilicate glass from synthetic sand

2016 ◽  
Vol 124 ◽  
pp. 189-192 ◽  
Author(s):  
Valerie L. Wiesner ◽  
Udaya K. Vempati ◽  
Narottam P. Bansal
Keyword(s):  
High Temperature ◽  
Aluminosilicate Glass ◽  
Calcium Magnesium

On the Methods for Measuring High Temperature Resistivity of Glass

2016 ◽  
Vol 680 ◽  
pp. 39-43
Author(s):  
Ying Liang Tian ◽  
Mei Zhang ◽  
Yong Ming Li ◽  
Feng Wang ◽  
Jing Ting Yang
Keyword(s):  
High Temperature ◽  
Test Procedure ◽  
Aluminosilicate Glass ◽  
Voltage Measurement ◽  
Advantages And Disadvantages ◽  
Measurement Results ◽  
Accuracy Of Measurement ◽  
High Alkali ◽  
Increasing Temperature ◽  
Temperature Resistivity

This paper described three methods for measuring high temperature resistivity of glass including their basic principles, advantages and disadvantages so as to provide a reference for measurement. The effects of electrode and voltage on high temperature resistivity were studied. Accuracy of measurement results of plate electrodes is better than wire electrodes. The resistivity of molten glass decreased with increasing AC voltage. Measurement results are stable when the voltage is less than 10 V, but when the voltage exceeds than 40 V, Joule heating effect will be generated resulting in smaller measurement values. In addition, high alkali aluminosilicate glass as object is used to introduce test procedure of temperature resistivity and explore the relationship between high temperature resistivity and alkali metal. Results show that high alkali aluminosilicate glass resistivity decreases with increasing temperature, and the effect of K2O on high tempearature resistivity is more pronounced.

scholarly journals Sol-Gel synthesis of high-temperature aluminosilicate glass-ceramics and composite materials on its basis

2019 ◽  
Vol 525 ◽  
pp. 012053 ◽  
Author(s):  
A S Chaynikova ◽  
N E Shchegoleva ◽  
S Y Modin ◽  
A A Akopian ◽  
D V Grashchenkov ◽  
...  
Keyword(s):  
High Temperature ◽  
Composite Materials ◽  
Sol Gel ◽  
Glass Ceramics ◽  
Aluminosilicate Glass ◽  
Sol Gel Synthesis

Oxynitride Glasses and Their Properties - Implications for High Temperature Performance of Silicon Nitride-Based Ceramics

2006 ◽  
Vol 317-318 ◽  
pp. 419-424 ◽  
Author(s):  
Stuart Hampshire ◽  
Michael J. Pomeroy
Keyword(s):  
Glass Transition ◽  
Rare Earth ◽  
High Temperature ◽  
Silicon Nitride ◽  
Elastic Moduli ◽  
Aluminosilicate Glass ◽  
Temperature Behaviour ◽  
Intergranular Films ◽  
Nitride Ceramics ◽  
Earth Cation

Oxynitirde glasses are found at triple point junctions and as intergranular films in silicon nitride based ceramics. The glass chemistry, particularly the content of modifyer,usually Y or a rare earth (RE) ion, and the volume fractions of these oxynitride glass phases within the ceramic control the properties of silicon nitride, in particular, creep at high temperature. It is known that, as nitrogen substitutes for oxygen in silicate and aluminosilicate glass networks, increases are observed in glass transition and softening temperatures, viscosities (by two to three orders of magnitude), elastic moduli and microhardness. If changes are made to the RE:Si:Al ratios or different rare earth cation are substituted, properties such as viscosity can be increased by a further two to three orders of magnitude. These effects have implications for the high temperature properties of silicon nitride based ceramics, especially creep resistance. This paper provides an overview of oxynitride glasses and outlines the effect of composition on properties such as glass transition temperature and viscosity and discusses the effects on high temperature behaviour of silicon nitride ceramics.

High-Temperature Flow of SiC Continuous Fiber-Glass Ceramic Matrix Composites: The Effect of Interface/Interphase Ductility

1994 ◽  
Vol 365 ◽  
Author(s):  
B.G. Nair ◽  
R.F. Cooper ◽  
J.N. Almquist ◽  
M.E. Plesha
Keyword(s):  
High Temperature ◽  
Glass Ceramic ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Constitutive Relationship ◽  
Aluminosilicate Glass ◽  
Matrix Composites ◽  
Bulk Specimen ◽  
Calcium Aluminosilicate ◽  
Rheologic Model

ABSTRACTThe elevated temperature rheology of continuous SiC (Nicalon®) calcium aluminosilicate glass-ceramic matrix composites is evaluated in uniaxial compression creep experiments (-σ1 = 20-to-40 MPa; T = 1300–1320°C). The steady state strain rate is demonstrated.to be highly sensitive to the orientation of the reinforcement relative to the maximum compressional stress, with highest bulk specimen strain rates noted for conditions in vWhich the sliding between the fiber and the matrix is optimized as a kinetic flow response (i.e., a fiber orientation of approximately 40-50° from σ1). One further discovers that the temperature sensitivity (i.e., activation energy) of flow increases as the amount of interface flow/sliding increases. The experimental results suggest that the high-temperature, low-stress interface response in this composite system is related to the ductile flow of the “Planar” SiO2 reaction-layer interphase that exists (in addition to the well-recognized planar carbon interphase) in these materials. The results of these simple experiments are used to calibrate a microscale-to-macroscale rheologic model in which the fibermatrix interface is described by a viscous constitutive relationship.

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