scholarly journals Microstructure examination of functionally graded NiTi/NiAl/Ni3Al intermetallic compound produced by self-propagating high-temperature synthesis

2017 ◽  
Vol 55 (02) ◽  
pp. 97-106 ◽  
Author(s):  
M. KILIC ◽  
I. KIRIK ◽  
M. OKUMUS
Keyword(s):  
High Temperature ◽  
Intermetallic Compound ◽  
Functionally Graded ◽  
Temperature Synthesis ◽  
Ni3al Intermetallic Compound ◽  
High Temperature Synthesis ◽  
Microstructure Examination ◽  
Ni3al Intermetallic

High-temperature synthesis of the Ni3Al intermetallic compound under pressure

2007 ◽  
Vol 48 (4) ◽  
pp. 297-302 ◽  
Author(s):  
V. E. Ovcharenko ◽  
O. V. Lapshin ◽  
E. N. Boyangin ◽  
I. S. Ramazanov ◽  
V. A. Chudinov
Keyword(s):  
High Temperature ◽  
Intermetallic Compound ◽  
Temperature Synthesis ◽  
Ni3al Intermetallic Compound ◽  
High Temperature Synthesis ◽  
Ni3al Intermetallic

Self-propagating high-temperature synthesis of functionally graded materials as thermal protection systems for high-temperature applications

2003 ◽  
Vol 18 (2) ◽  
pp. 448-455 ◽  
Author(s):  
N. Bertolino ◽  
M. Monagheddu ◽  
A. Tacca ◽  
P. Giuliani ◽  
C. Zanotti ◽  
...  
Keyword(s):  
High Temperature ◽  
Functionally Graded Materials ◽  
Thermal Protection ◽  
Functionally Graded ◽  
Temperature Synthesis ◽  
Thermal Tests ◽  
Graded Materials ◽  
Thermal Barriers ◽  
High Temperature Synthesis ◽  
Spatial Composition

Self-propagating high-temperature synthesis was used to prepare boride-based functionally graded materials (FGMs) as thermal barriers for space re-entry vehicles. FGMs are characterized by inhomogeneous spatial composition, resulting in different spatial characteristics. In this work, the FGMs were composed of a ceramic [i.e., MB2 (M = Ti, Zr, Hf)] and a metallic (i.e., NiAl) side, joined together by composite layers of graded stoichiometries of the two components. Thus, in the same material, the boride end gives thermal insulation, while the intermetallic end offers an easy junction to the structure of the space aircraft. The prepared FGMs showed good adhesion between the layers and global compactness after preparation and thermal tests. The microhardness along the samples was measured, and their insulating capabilities were evaluated.

Effect of Ar Gas Pressure on Phase Separation of Tungsten Silicides Intermetallic Compound In Situ Self-Propagating High Temperature Synthesis-Casting Process

2012 ◽  
Vol 626 ◽  
pp. 143-146 ◽  
Author(s):  
Tawat Chanadee ◽  
Sutham Niyomwas ◽  
Jessada Wannasin
Keyword(s):  
Phase Separation ◽  
High Temperature ◽  
Intermetallic Compound ◽  
Gas Pressure ◽  
Oxide Ceramic ◽  
Temperature Synthesis ◽  
High Temperature Synthesis ◽  
Ar Gas ◽  
Tungsten Silicides

Tungsten silicides intermetallic compound (WSi2) was synthesized in-situ by self-propagating high temperature synthesis-casting of WO3-Si-Al system in Ar gas environment. It is proposed that the extent of phase separation between oxide ceramic and intermetallic compound depends on the reaction temperature that made a lower viscosity and longer lifetime of the melted. The effects of inert gas pressure on densification of the intemetallic product were investigated.

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