Patent
Boron-carbide-aluminum and boron-carbide-reactive- metal cermets
Reads0
Chats0
TLDR
Hard, tough, lightweight boron-carbide-reactive metal composites, particularly BCA-aluminum composites as discussed by the authors, have been used to form a variety of structural elements.Abstract:
Hard, tough, lightweight boron-carbide-reactive metal composites, particularly boron-carbide-aluminum composites, are produced. These composites have compositions with a plurality of phases. A method is provided, including the steps of wetting and reacting the starting materials, by which the microstructures in the resulting composites can be controllably selected. Starting compositions, reaction temperatures, reaction times, and reaction atmospheres are parameters for controlling the process and resulting compositions. The ceramic phases are homogeneously distributed in the metal phases and adhesive forces at ceramic-metal interfaces are maximized. An initial consolidation step is used to achieve fully dense composites. Microstructures of boron-carbide-aluminum cermets have been produced with modulus of rupture exceeding 110 ksi and fracture toughness exceeding 12 ksi√in. These composites and methods can be used to form a variety of structural elements.read more
Citations
More filters
Journal ArticleDOI
Processing of boron carbide-aluminum composites
TL;DR: In this paper, the authors established reliable criteria for fabricating B4C-AI particulate composites based on fundamental capillarity thermodynamics, reaction thermodynamics and densification kinetics.
Journal ArticleDOI
Processing and microstructural characterisation of AA 1070 and AA 6063 matrix B4Cp reinforced composites
TL;DR: In this article, the microstructure of matrix/reinforcement interfaces of both as-cast and heat treated samples with or without Ti additions were investigated with SEM studies, and the reaction layer was also characterized with EDS analysis and X-ray mapping.
Journal ArticleDOI
Al-B-C Phase Development and Effects on Mechanical Properties of B4C/Al-Derived Composites
TL;DR: In this paper, a multiphase B4C/A1 composites containing 5-10 vol% free metal are compared to ceramics, and the highest hardness (88 Rockwell A) and Young's modulus (310 GPa) are obtained in Al4BC-rich samples.
Patent
Metal matrix composite
TL;DR: An improved metal matrix composite utilizes boron carbide as a ceramic additive to a base material metal as mentioned in this paper, which is useful in a variety of applications where lightweight, strength, stiffness, hardness, and low density are desirable.
Journal ArticleDOI
Ceramic-Metal Composite Produced by Melt Infiltration
Cetin Toy,William D. Scott +1 more
TL;DR: In this paper, a new ceramic-metal composite with continuous interconnected ceramic and metal phases has been fabricated from sintered aluminum nitride infiltrated with aluminum metal, and a dense, lightweight, hard material with high strength has been obtained.
References
More filters
Patent
Process for making aluminum modified boron carbide and products resulting therefrom
TL;DR: In this paper, a process for fabricating high density aluminum modified boron carbide compositions comprising the steps of blending specific quantities of powdered borone carbide and powdered aluminum together with a small quantity of temporary organic binder, preforming this mixture to the desired shape with high pressure at room temperature, followed by final densification of the finished product at a temperature below the sintering temperature of boronet carbide.
Patent
Cold-pressed compositions
TL;DR: HARD, SHAPED BODIES are made by sintering a COLDPRESSED COMPACT of a BORON-CARBON COMPOUND WHICH CONTAINS a DENSIFICATION AID SELECTED from SILICON, ALUMINUM, MAGNESIUM, METAL BORIDES, AND MIXTURES THEREOF.