Boron carbide and nitride as reactants for in situ synthesis of boride-containing ceramic composites

Zhang, G.J.; Ando, Motohide; Yang, Jianfeng; Ohji, Tatsuki; Kanzaki, Shuzo

doi:10.1016/s0955-2219(03)00607-1

Cited by 120 publications

(81 citation statements)

References 23 publications

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“…Similar to Ti, molten Zr may be expected to react with boron carbide and yield two reaction products ZrB2 and ZrC [171,173].…”

Section: Reaction Thermodynamicsmentioning

confidence: 99%

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Developing Sc and Zr containing Al-B C metal matrix composites for high temperature applications /

Lai¹

2011

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RESUMEDans cette étude, nous nous intéressons principalement au développement de la coulée, et au durcissement structrural des composites à matrice métallique AI-B4C pour des applications à haute temperature. Le scandium et le zirconium ont été introduits dans le système AI-B4C, comme éléments d'alliage, et leurs effets sur la microstrcture, la réponse au vieillissement, les propriétés mécaniques et la stabilité thermique ont été étudiés.Afin de réaliser cette étude, un microscope optique, un microscope électronique à balayage et un microscope électronique à transmission ont été utilisés dans le but d'observer la microstructure de brut de coulée et celle obtenue après vieillissement, d'analyser les réactions interfaciales, la distribution des éléments d'alliage entre l'interface et la matrice ainsi que pour examiner l'évolution des précipités lors de la couleé et le vieillissement.La réponse au vieillissement et le durcissement structural de la matrice ont été suivis par des mesures de dureté 'Vickers'. Les propriétés mécaniques et la stabilité thermique à long terme des composites contenant Se et Zr ont été évaluées en utilisant des essais de dureté Vickers et Rockwell ainsi que des essais de compression.Dans le premier chapitre de cette étude, des plaques de B4C ont été immergées dans l'aluminium liquide contenant Se, Zr et Ti afin d'étudier les réactions interfaciales entre le B4C et l'aluminium liquide. Les effets de Se, Zr et Ti à l'interface en terme d'apports individuels et combinés ont été examinés. Les résultats montrent que les trois éléments réagissent avec B4C et forment des couches interfaciales, qui agissent comme des barrières de diffusion, dans le but de limiter la décomposition du B4C dans l'aluminium liquide. Ainsi, les réactions interfaciales et les produits de réaction dans chaque système ont été identifiés. En combinant le Se, Zr et Ti, une grande quantité de Ti est enrichie à l'interface, qui non seulement offre une protection appropriée au B4C mais aussi une réduction de la consomation de Se et Zr à l'interface.Dans le second chapitre, le scandium et le zirconium ont été introduits dans le composite Al-15vol.% B4C, présaturé par Ti et huit composites à diférents teneurs en Se et Zr ont été préparés par couleé conventionelle. Il a été constaté que le scandium favorise les réactions interfaciales avec B4C qui consomme partiellement le Se. L'ajout de Se procure un durcissement structural considerable dans les conditions de couleé conventionnelle et du pic de veiellissement. Afin d'obtenir un durcissement equivalent de Se dans les alliages binaires, environ le double de la quantité de Se est nécessaire pour les composites AI-B4C. Par contre, aucun produit de réaction majeur de Zr n'a été trouvé aux interfaces. En effet, la majeure partie de Zr se concentre dans la matrice pour le durcissenent structurale. La combinaison de Se et Zr augmente de manière significative le durcissement structural. Deux types de précipités nanométriques, AI3SC et Al3(Sc, Zr), ont été observés dans la 11 microstructu...

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“…Similar to Ti, molten Zr may be expected to react with boron carbide and yield two reaction products ZrB2 and ZrC [171,173].…”

Section: Reaction Thermodynamicsmentioning

confidence: 99%

“…In the literature [173], it was reported that Zr reacted with B4C to form zirconium diboride (ZrB2) and zirconium carbide (ZrC).…”

Section: 21mentioning

confidence: 99%

Developing Sc and Zr containing Al-B C metal matrix composites for high temperature applications /

Lai¹

2011

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“…The size of TiO 2 , Al, and B 4 C particles is estimated to be 36, 33, and 20lm in diameter, respectively. The weight ratio of TiO 2 -B 4 C-Al was chosen based on the following reaction [19]:…”

Section: Experimental Detailmentioning

confidence: 99%

Fabrication In Situ TiB2–TiC–Al2O3 Multiple Ceramic Particles Reinforced Fe-Based Composite Coatings by Gas Tungsten Arc Welding

Wang

Zhang

2010

Tribol Lett

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A Fe-based composite coating reinforced by multiple TiB 2 -TiC-Al 2 O 3 ceramic particles was developed by gas tungsten arc welding (GTAW) melting process. Mixture of aluminum (Al), boron carbide (B 4 C), and titanium dioxide (TiO 2 ) powders was used as precursors, and as a consequence TiB 2 -TiC-Al 2 O 3 multiple ceramic particles were in situ synthesized during GTAW melting process. Microstructural investigations showed that TiB 2 particles exhibit a blocky morphology, TiC particles are of flower-like shape, and the Al 2 O 3 particles exist as small black dots and located in the core of reinforced particles. The hardness and wear resistance of the coatings increased drastically in comparison with that of the substrate.

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“…It is currently used in high-technology industries fastbreeders, lightweight armours and high-temperature thermoelectric conversion due to such properties as high melting point, outstanding hardness, good mechanical properties, low specific weight and great resistance to chemical agents [21]. It is an extremely promising material for a variety of applications that require elevated hardness, good wear and corrosion resistance [22] and [23], and the highlighted areas of application are due to its excellent properties [24]. B 4 C also finds application in the nuclear industry and high-temperature thermo-electric conversion, but there is a restriction to its wide industrial application because of low strength (about 200 MPa to 400 MPa), low fracture toughness (2 MPa/√m to 3 MPa/√m), as well as poor sinterability that results from its low selfdiffusion coefficient.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Influence of Laser Power on the Microstructure and Properties of a Titanium Alloy-Reinforced Boron Carbide Matrix Composite (Ti6Al4V-B4C)

Ogunlana¹,

Akinlabi²,

Erinosho³

2017

SV-JME

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Titanium and its alloys are used for highly demanding applications, such as in the fabrication of some of the most critical and highly stressed civilian and military aircraft parts, chemical processing, automobile industries, nuclear power plants, food processing plants and oil refinery heat exchangers. This wide range of applications has been attributed to its excellent properties, such as low density, high specific strength, heat resistance, corrosion resistance, low temperature resistance, and excellent biocompatibility. Several suggestions have been made that the physical and mechanical properties of titanium can be improved through the integration of reinforcing compounds using the principle of metal matrix composites (MMCs), since they combine the properties of ceramics and metals to produce good shear strength, high temperature strength and elevated hardness composites [1]. Titanium carbide has been agglomerated with Ti6Al4V alloy to improve its wear properties [2]. Different coatings such as plasmasprayed Al-bronze have been applied to the surface of titanium to improve the operational life [3]. The microstructural behaviour of titanium alloy is an important aspect to be studied with the establishment of new phases [4].In contrast, laser metal deposition (LMD) is an additive manufacturing (AM) technique that serves as a recommended technique for processing titanium and its alloy, since it addresses most of the problems of the traditional manufacturing methods [5]. This AM technology is also a promising aerospace manufacturing technique due to its potential of reducing the buy-to-fly ratio and repairing high valued parts [6]. Among the various methods of coating the surface of materials, which includes chemical vapour deposition, physical vapour deposition, spraying, etc., the LMD process is believed to have a greater advantage over other methods of coating [7]. Some of the advantages of using the LMD process include the ability to produce parts directly from a 3-dimensional computer aided design (CAD) model of the part [8] with the required surface coating in one step [9]; and its ability to be used for repair of existing worn out parts that were not repairable in the past [10]. Despite the significant progress in this field, there are still some of technical challenges that need improvement, which includes material characterization and availability [11]. The adopted approach of layer-by- Analysis of the Influence of Laser Power on the Microstructure and Properties of a Titanium Alloy-Reinforced Boron CarbideMatrix Composite (Ti6Al4V-B 4 C)

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Boron carbide and nitride as reactants for in situ synthesis of boride-containing ceramic composites

Cited by 120 publications

References 23 publications

Developing Sc and Zr containing Al-B C metal matrix composites for high temperature applications /

Developing Sc and Zr containing Al-B C metal matrix composites for high temperature applications /

Fabrication In Situ TiB2–TiC–Al2O3 Multiple Ceramic Particles Reinforced Fe-Based Composite Coatings by Gas Tungsten Arc Welding

Analysis of the Influence of Laser Power on the Microstructure and Properties of a Titanium Alloy-Reinforced Boron Carbide Matrix Composite (Ti6Al4V-B4C)

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