Molten-State Kinetics in Glass-Forming Systems. A High-Temperature NMR Study of the System Phosphorus-Selenium

1995 ◽  
Vol 99 (13) ◽  
pp. 4768-4778 ◽  
Author(s):  
Robert Maxwell ◽  
Hellmut Eckert
Keyword(s):  
High Temperature ◽  
Molten State ◽  
Glass Forming ◽  
Nmr Study

Electron Microscopy of Silicon Nitride-Based Ceramics

1991 ◽  
Vol 49 ◽  
pp. 926-927
Author(s):  
Gareth Thomas
Keyword(s):  
Electron Microscopy ◽  
High Temperature ◽  
Silicon Nitride ◽  
World Wide ◽  
Sintering Temperature ◽  
Liquid Phase Sintering ◽  
High Temperature Strength ◽  
Sintering Additives ◽  
Glass Forming ◽  
Dense Product

Silicon nitride and silicon nitride based-ceramics are now well known for their potential as hightemperature structural materials, e.g. in engines. However, as is the case for many ceramics, in order to produce a dense product, sintering additives are utilized which allow liquid-phase sintering to occur; but upon cooling from the sintering temperature residual intergranular phases are formed which can be deleterious to high-temperature strength and oxidation resistance, especially if these phases are nonviscous glasses. Many oxide sintering additives have been utilized in processing attempts world-wide to produce dense creep resistant components using Si3N4 but the problem of controlling intergranular phases requires an understanding of the glass forming and subsequent glass-crystalline transformations that can occur at the grain boundaries.

Structural topological signature of high-temperature non-Arrhenius crossover in metallic glass-forming liquids

2021 ◽  
Vol 200 ◽  
pp. 113926
Author(s):  
Nannan Ren ◽  
Lina Hu ◽  
Bing Wang ◽  
Kaikai Song ◽  
Pengfei Guan
Keyword(s):  
High Temperature ◽  
Metallic Glass ◽  
Glass Forming

A high-temperature high-resolution NMR study of 23Na, 27Al and 29Si in molten silicates

Nature ◽  
1985 ◽  
Vol 314 (6008) ◽  
pp. 250-252 ◽  
Author(s):  
J. F. Stebbins ◽  
J. B. Murdoch ◽  
E. Schneider ◽  
I. S. E. Carmichael ◽  
A. Pines
Keyword(s):  
High Temperature ◽  
High Resolution ◽  
Nmr Study ◽  
High Resolution Nmr

scholarly journals NMR Behaviour of Molten 115Indium Chlorides

1984 ◽  
Vol 39 (11) ◽  
pp. 1112-1114
Author(s):  
Chiara Margheritis
Keyword(s):  
Chemical Shifts ◽  
Molten State ◽  
Nmr Study ◽  
Line Widths

An NMR study was made of the 115In nucleus in InCl. InCl2, InCl3 and in a mixture InCl3 + NaCl. Chemical shifts and line-widths as a function of temperature were recorded in the molten state for all samples except InCl3. As regards InCl2, NMR results gave little support to the generally held view that InCl2 is InI(InIIICl4) rather than (InIICl2)2.

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