The combustion synthesis of refractory nitrides

Munir, Zuhair A.; Holt, Jason

doi:10.1007/bf01160792

Cited by 107 publications

(56 citation statements)

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“…In this review only few selected papers are mentioned [92][93][94][95][96][97][98][99][100][101][102][103][104][105]. He has also made very important contribution to the SHS community by reviewing articles on SHS for many journals, including the Ceramic Bulletin, and Materials Science Reports , which are cited by thou- [118][119][120][121][122][123][124][125][126].…”

Section: Combustion Synthesis Research In Usa After 1980mentioning

confidence: 99%

See 1 more Smart Citation

Historical perspective and contribution of US researchers into the field of self-propagating high-temperature synthesis (SHS)/combustion synthesis (CS): Personal reflections

McCauley

Puszynski

2008

Int. J Self-Propag. High-Temp. S

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Section: Combustion Synthesis Research In Usa After 1980mentioning

confidence: 99%

“…His research activities at University of California at Davis resulted in education of large number of excellent scientists who are working in many countries. His selected major research contributions are listed below [92][93][94][95][96][97][98][99][100][101][102][103][104][105]:…”

Section: Combustion Synthesis Research In Usa After 1980mentioning

confidence: 99%

Historical perspective and contribution of US researchers into the field of self-propagating high-temperature synthesis (SHS)/combustion synthesis (CS): Personal reflections

McCauley

Puszynski

2008

Int. J Self-Propag. High-Temp. S

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“…However, overlong ball milling caused too low ignition and combustion temperature that combustion process could not self-propagate, which can be attributed to Munir's empirical rule [22] for the CS reaction: The CS reaction can self-propagate only if the adiabatic temperature (T ad ) ≥ 1800 K. that has also been reported in reference [23]. With the increase of ball milling time, the products agglomerated together and showed a shape like flower due to the cohered particles by long ball milling shown in aforementioned Fig.…”

Section: Resultsmentioning

confidence: 99%

Mechanical-activated, combustion synthesis of β-SiAlON

Akiyama

2010

Journal of Alloys and Compounds

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In this paper, β-Si 6-z Al z O z N 8-z (z = 1) powder was synthesized via combustion synthesis (CS) assisted with mechanical activation by a high energy planetary ball milling under various nitrogen pressures (0.7, 1.0, 1.5, and 2.5 MPa). The effect of ball milling time and nitrogen pressure on the reaction rate and microstructure of CSed products were investigated using XRD and SEM. The effect on the nitrogen pressure required for CS of β-SiAlON was also examined. The results show that prolonged milling time was effective for enhancing the reactivity of raw materials and also for promoting the conversion rate of β-SiAlON. The mechanical activation also minimized nitrogen pressure required for the CS of β-SiAlON, which the reaction can self-propagate at only 0.7 MPa in nitrogen pressure. Significantly, the rod-like crystals agglomerated together with increasing ball milling time, and became longer and thicker with increasing nitrogen pressure.

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“…Los precursores utilizados para la síntesis por combustión del la cerámica Sm 0.95 CoO 3−δ fueron los siguientes, Sm(NO 3 ) 3 .6H 2 O (Aldrich, 99.9 %), Co(NO 3 ) 3 .6H 2 O (Merck, 99 %), y urea (CO(NH 2 ) 2 ) (Aldrich, 98 %) como combustible.…”

Section: Materiales Y Síntesis Por Combustión De Sm 095 Coo 3−δunclassified

“…Las variaciones de entalpía implicadas en estas reacciones químicas se han calculado a partir de las entalpías de formación a 25ºC publicadas en la ref. (31), lo mismo que los datos en los que se ha basado el cálculo estimado de la entalpía de reacción de R1, puesto que no se encontró en la literatura el dato de ∆Hº f del Sm(NO 3 ) 3 .6H 2 O (c)). La reacción de combustión de la urea (R3) es exotérmica y debe proporcionar el calor necesario para la reacción de síntesis.…”

Section: Síntesis De Los Materialesunclassified

Posibilidades del análisis de imagen para el estudio de la síntesis de materiales por combustión

Chinarro¹,

Moreno²,

Martín³

et al. 2005

Bol. Soc. Esp. Ceram. Vidr.

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El análisis de la imagen obtenida por una cámara de video digital se utiliza para el estudio de la reacción de síntesis por combustión de Sm 0.95 CoO 3-δ . El método de combustión presenta como característica intrínseca la generación de materiales nanométricos cerámicos y metal-cerámicos; permitiendo la producción de compuestos con actividad catalítica. En este trabajo se obtienen polvos de tamaño de cristalito entorno a 5 nm, con una superficie específica de 24 m 2 /g y como consecuencia bastante reactivos. Se llevaron cabo estudios preliminares sobre la etapa de ignición de la síntesis usando el análisis de imagen por descomposición de los planos de los tres colores primarios; dichos experimentos muestran que la llama generada en esta etapa de ignición es un proceso termodinámicamente aleatorio. La finalidad de este trabajo es establecer un protocolo de experimentación para la futura correlación entre los parámetros de la síntesis por combustión de un material, naturaleza y concentración de precursores entre otros, y la distribución de temperatura durante la ignición, con objeto de optimizar y controlar el proceso. Se abre una línea de investigación basada en la utilización de la técnica de análisis de imagen para realizar un seguimiento controlado de la evolución de la temperatura e intensidad de la llama durante la etapa de ignición de la síntesis por combustión de un material. Palabras clave: síntesis de materiales por combustión, análisis de imagen, temperatura de llama, planos de intensidad. Study of material combustion synthesis by image analysisAnalysis of the recorded image by a digital video camera of the Sm 0.95 CoO 3-δ combustion synthesis is carried out. Intrinsically the combustion method yields nanometric materials (ceramic and metal-ceramic); allowing to produce catalytic powders. In this work, nanocrystalline powders of around 5 nm with 24 m 2 /g of specific surface area and, consequently, high reactivity powders were obtained. Preliminary studies were done about ignition step of the synthesis, using image analysis from the three primary colours planes decomposition, these experiments show that the generated flame in this ignition step is a thermodynamically random process. The final aim of this work is to establish a protocol of performance to a future correlation among relevant combustion synthesis parameters of materials, i.e. the precursors nature and concentration, and the temperature distribution during the ignition, to optimise and control the process. This investigation opens an important field, the use of image analysis to carry out a thorough study of the temperature evolution and of the flame intensity during the ignition step of a material combustion synthesis.Keywords: materials combustion synthesis, image analysis, flame temperature, intensity planes. INTRODUCCIÓNLa síntesis por combustión de materiales avanzados (cerámicos, metales y cermets) es un método de síntesis de reciente desarrollo (1,2) y la evaluación del comportamiento térmico durante todo el proceso es complicado.Una ...

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The combustion synthesis of refractory nitrides

Cited by 107 publications

References 2 publications

Historical perspective and contribution of US researchers into the field of self-propagating high-temperature synthesis (SHS)/combustion synthesis (CS): Personal reflections

Historical perspective and contribution of US researchers into the field of self-propagating high-temperature synthesis (SHS)/combustion synthesis (CS): Personal reflections

Mechanical-activated, combustion synthesis of β-SiAlON

Posibilidades del análisis de imagen para el estudio de la síntesis de materiales por combustión

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