Self-propagating high-temperature synthesis of aluminum substituted lanthanum ferrites LaFe1−xAlxO3 (0 ≤ x ≤ 1.0)

2015 ◽  
Vol 39 (12) ◽  
pp. 9834-9840 ◽  
Author(s):  
Maxim V. Kuznetsov ◽  
Iurii G. Morozov ◽  
Ivan P. Parkin
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
External Magnetic Field ◽  
Combustion Reaction ◽  
Temperature Synthesis ◽  
Complete Combustion ◽  
High Temperature Synthesis

An external magnetic field results in more complete combustion reaction as well as the change in structural, magnetic and Mössbauer characteristics of ferrites.

Microstructural aspects of the self-propagating high temperature synthesis of hexagonal barium ferrites in an external magnetic field

2000 ◽  
Vol 10 (8) ◽  
pp. 1925-1932 ◽  
Author(s):  
Louise Affleck ◽  
Marco D. Aguas ◽  
Ivan P. Parkin ◽  
Quentin A. Pankhurst ◽  
Maxim V. Kuznetsov
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
External Magnetic Field ◽  
The Self ◽  
Temperature Synthesis ◽  
High Temperature Synthesis ◽  
Barium Ferrites

Self‐propagating high‐temperature synthesis of ferrites MFe2O4 (M = Mg, Ba, Co, Ni, Cu, Zn); reactions in an external magnetic field

1999 ◽  
Vol 9 (10) ◽  
pp. 2545-2552 ◽  
Author(s):  
Warren B. Cross ◽  
Louise Affleck ◽  
Maxim V. Kuznetsov ◽  
Ivan P. Parkin ◽  
Quentin A. Pankhurst
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
External Magnetic Field ◽  
Temperature Synthesis ◽  
High Temperature Synthesis

scholarly journals Mechanism of self-propagating hightemperature synthesis of AlB2‒Al2O3

2019 ◽  
pp. 27-36
Author(s):  
Pan Yang ◽  
Guoqing Xiao ◽  
Donghai Ding ◽  
Yun Ren ◽  
Zhongwei Zhang ◽  
...  
Keyword(s):  
High Temperature ◽  
Ignition Temperature ◽  
Combustion Reaction ◽  
Peritectic Temperature ◽  
Composite Powders ◽  
Temperature Synthesis ◽  
Precipitation Mechanism ◽  
High Temperature Synthesis ◽  
Higher Temperature ◽  
Quenching Method

The mechanism of self-propagating high-temperature synthesis (SHS) of AlB2‒Al2O3 composite powders was studied by means of a combustion front quenching method (CFQM). The results showed that combustion reaction started with the melting of B2O3 and Al particles. As the combustion reaction proceeded, the interpenetration of Al and B2O3 in melts happened. The XRD results of the product revealed the reflections of Al2O3, suggesting there had been an exchange of oxygen atoms between Al and B, and evidencing the reaction, B2O3 (l) + 2Al (l) → 2B (s) + Al2O3 (l). Under higher temperature, some of B2O3 volatilized and reacted with B forming gaseous B2O2, which deposited on the surface of Al to precipitate Al2O3 and B. Then B made available dissolved into Al melt, and reacted with the Al in melt to precipitate AlB12 particles. Finally, AlB12 transforms to AlB2 at the peritectic temperature under high cooling rate. Thus, this combustion reaction can be described by the dissolution-precipitation mechanism. In the final products, besides AlB2 and Al2O3 particles, some of Al was also detected. A model corresponding to the dissolutionprecipitation mechanism was proposed, and the ignition temperature of the combustion reaction was determined to be around 800 °C. Ill. 13. Ref. 47.

Self-Propagating High-Temperature Synthesis for Aluminum Oxynitride (AlON)

2006 ◽  
Vol 510-511 ◽  
pp. 662-665 ◽  
Author(s):  
Jae Ryeong Lee ◽  
Ikkyu Lee ◽  
Hun Saeng Chung ◽  
Jong Gwan Ahn ◽  
Dong Jin Kim ◽  
...  
Keyword(s):  
High Temperature ◽  
Nitrogen Pressure ◽  
Combustion Reaction ◽  
Aluminum Oxynitride ◽  
Temperature Synthesis ◽  
Peak Intensity ◽  
High Temperature Synthesis

As the result of combustion reaction in Al-Al2O3-N2 system, AlON phase can be synthesized in the range of initial nitrogen pressure, from 1 to 5 MPa. On the occasion of rm = 0.3, the unreacted Al was detected in the case of 1 MPa of PN2. Its intensity decreases with an increase of nitrogen pressure. Ultimately, no peak of Al was observed in the product at nitrogen pressure of 5 MPa. In addition, the peak intensity of AlON in the products increases proportionally with the nitrogen pressure, while the intensities of AlN and Al2O3 decrease slightly with an increase of nitrogen pressure. The formation of AlON may be induced by successive two reactions. The former is the formation of AlN, and the latter is the reaction between AlN and Al2O3 in the after-burning period sustaining high temperature.

Formation of self-propagating high-temperature synthesis products in a magnetic field

1999 ◽  
Vol 35 (3) ◽  
pp. 271-274 ◽  
Author(s):  
A. I. Kirdyashkin ◽  
Yu. M. Maksimov ◽  
V. D. Kitler ◽  
O. K. Lepakova ◽  
V. V. Burkin ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
Temperature Synthesis ◽  
High Temperature Synthesis

Hardening of metal surface via self-propagating high-temperature synthesis in thin films

2007 ◽  
Vol 43 (4) ◽  
pp. 239-242
Author(s):  
S. Kh. Suleimanov ◽  
O. A. Dudko ◽  
V. G. Dyskin ◽  
Z. S. Settarova ◽  
M. U. Dzhanklych
Keyword(s):  
Thin Films ◽  
High Temperature ◽  
Metal Surface ◽  
Temperature Synthesis ◽  
High Temperature Synthesis

Effect of Additives on the Characteristics of Amorphous Nano Boron Powder Fabricated by Self-Propagating High Temperature Synthesis

2015 ◽  
Vol 25 (12) ◽  
pp. 659-665
Author(s):  
Sin Hyong Joo ◽  
Hayk H. Nersisyan ◽  
Tae Hyuk Lee ◽  
Young Hee Cho ◽  
Hong Moule Kim ◽  
...  
Keyword(s):  
High Temperature ◽  
Temperature Synthesis ◽  
Boron Powder ◽  
Effect Of Additives ◽  
High Temperature Synthesis

scholarly journals High-Temperature Synthesis of Metal–Matrix Composites (Ni-Ti)-TiB2

2021 ◽  
Vol 11 (5) ◽  
pp. 2426
Author(s):  
Vladimir Promakhov ◽  
Alexey Matveev ◽  
Nikita Schulz ◽  
Mikhail Grigoriev ◽  
Andrey Olisov ◽  
...  
Keyword(s):  
High Temperature ◽  
Composite Materials ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Average Particle Size ◽  
Synthesis Process ◽  
Average Particle ◽  
Temperature Synthesis ◽  
High Temperature Synthesis

Currently, metal–matrix composite materials are some of the most promising types of materials, and they combine the advantages of a metal matrix and reinforcing particles/fibres. Within the framework of this article, the high-temperature synthesis of metal–matrix composite materials based on the (Ni-Ti)-TiB2 system was studied. The selected approaches make it possible to obtain composite materials of various compositions without contamination and with a high degree of energy efficiency during production processes. Combustion processes in the samples of a 63.5 wt.% NiB + 36.5 wt.% Ti mixture and the phase composition and structure of the synthesis products were researched. It has been established that the synthesis process in the samples proceeds via the spin combustion mechanism. It has been shown that self-propagating high-temperature synthesis (SHS) powder particles have a composite structure and consist of a Ni-Ti matrix and TiB2 reinforcement inclusions that are uniformly distributed inside it. The inclusion size lies in the range between 0.1 and 4 µm, and the average particle size is 0.57 µm. The obtained metal-matrix composite materials can be used in additive manufacturing technologies as ligatures for heat-resistant alloys, as well as for the synthesis of composites using traditional methods of powder metallurgy.

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