Combustion co-synthesis of Si3N4-based in situ composites

1996 ◽  
Vol 11 (12) ◽  
pp. 2968-2970 ◽  
Author(s):  
J. T. Li ◽  
W. S. Liu ◽  
Y. L. Xia ◽  
C. C. Ge
Keyword(s):  
Solid Solution ◽  
Silicon Carbide ◽  
Silicon Nitride ◽  
Thermodynamic Analysis ◽  
Experimental Results ◽  
Titanium Carbonitride ◽  
In Situ Composites

The feasibility of synthesizing silicon nitride-silicon carbide-titanium carbonitride composites by combustion reactions is demonstrated. With titanium carbonitride taken to be an ideal solid solution, its composition is determined as TiC0.36N0.64. Thermodynamic analysis supports the experimental results.

scholarly journals Silicon Carbide Formation Enhanced by In-Situ-Formed Silicon Nitride: An Approach to Capture Thermal Energy of CO-Rich Off-Gas Combustion

2018 ◽  
Vol 49 (6) ◽  
pp. 3151-3163 ◽  
Author(s):  
S. P. du Preez ◽  
J. P. Beukes ◽  
P. G. van Zyl ◽  
M. Tangstad ◽  
L. R. Tiedt
Keyword(s):  
Silicon Carbide ◽  
Silicon Nitride ◽  
Thermal Energy ◽  
Carbide Formation ◽  
Gas Combustion

In Situ Reaction Synthesis of Silicon Carbide-Boron Nitride Composite from Silicon Nitride-Boron Oxide-Carbon

2004 ◽  
Vol 85 (11) ◽  
pp. 2858-2860 ◽  
Author(s):  
Guo-Jun Zhang ◽  
Yoshihisa Beppu ◽  
Motohide Ando ◽  
Jian-Feng Yang ◽  
Tatsuki Ohji
Keyword(s):  
Silicon Carbide ◽  
Silicon Nitride ◽  
Boron Nitride ◽  
Boron Oxide ◽  
Reaction Synthesis ◽  
In Situ Reaction

Thermodynamic Analysis of V-concentrating Phase Formation in V-bearing Steelmaking Slag Modified by MgO

2015 ◽  
Vol 34 (6) ◽  
Author(s):  
Liushun Wu ◽  
Wei Gao ◽  
Dawei Xie ◽  
Liaosha Li ◽  
Yuanchi Dong
Keyword(s):  
Solid Solution ◽  
Magnesium Oxide ◽  
Thermodynamic Analysis ◽  
Phase Formation ◽  
Calcium Silicate ◽  
Experimental Results ◽  
Calcium Ferrite ◽  
Steelmaking Slag

AbstractIn the study, magnesium oxide acting as modifier was added to V-bearing steelmaking slag to concentrate vanadium, and then the effect of magnesium oxide on the formation of V-concentrating phase during cooling was investigated. Experimental results show that, in the case of the original slag, di-calcium silicate along with most of vanadate and phosphate in the slag forms solid solution, calcium ferrite which contains small part of vanadium in the slag and matrix without vanadium in turn precipitate during slowly cooling; For the sample with 8% MgO addition, two new phases (merwinite and V-concentrating phase) generate during slowly cooling, and the amount of di-calcium silicate decreases. Merwinite phase doesn’t contain vanadium, and V-concentrating phase (Ca

Superplastic Deformation in Silicon Nitride-Silicon Oxynitride In Situ Composites

2004 ◽  
Vol 83 (10) ◽  
pp. 2529-2535 ◽  
Author(s):  
Rong-Jun Xie ◽  
Mamoru Mitomo ◽  
Guo-Dong Zhan ◽  
Hideyuki Emoto
Keyword(s):  
Silicon Nitride ◽  
Superplastic Deformation ◽  
Silicon Oxynitride ◽  
In Situ Composites

Ti-Modified Niobium-Silicide Based Directionally Solidified in-situ Composites

1996 ◽  
Vol 460 ◽  
Author(s):  
B. P. Bewlay ◽  
M. R. Jackson ◽  
H. A. Lipsitt
Keyword(s):  
Solid Solution ◽  
Fracture Toughness ◽  
High Temperature ◽  
Cold Crucible ◽  
Directionally Solidified ◽  
In Situ Composites ◽  
Czochralski Crystal Growth ◽  
Three Phase ◽  
Binary Eutectic

ABSTRACTThis paper examines microstructure-property relationships in high-temperature directionally solidified (DS) in-situ composites based on Nb silicides, such as Nb3Si and Nb5Si3. These in-situ composites are based on the Nb3Si-Nb binary eutectic, and are alloyed with Ti. They were prepared using cold crucible Czochralski crystal growth. Ternary Nb-Ti-Si alloys with Ti concentrations from 9 to 45%, and Si concentrations from 10 to 25%, were directionally solidified to generate aligned two- and three-phase composites containing a Nb solid solution with Nb3Si and Nb5Si3 silicides. Fracture toughness values generally greater than 10 MPa√m were measured in these composites. For a given Si concentration, the fracture toughness of the Ti-containing composites was increased ∼ 6 MPa√m over that of the binary alloy composites. The effects of Si concentration, and a range of Nb:Ti ratios, on microstructure, phase equilibria, and fracture toughness were examined.

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