Boron carbide - Wikipedia
Boron carbide (chemical formula approximately B 4 C) is an extremely hard boron–carbon ceramic and covalent material used in tank armor, bulletproof vests, engine sabotage powders, as well as numerous industrial applications. With a Vickers Hardness of >30 GPa, it is one of the hardest known materials, behind cubic boron nitride and diamond.
WO2015019992A1 - Boron carbide ceramic, and a production ...
The present invention includes: a step in which amorphous boron and amorphous carbon are weighed out to a molar ratio of B:C=4:1, and a starting material comprising the amorphous boron and the amorphous carbon is prepared without performing wet blending; a step in which a dispersion treatment is performed on 5-15 vol% (preferably 10-12.5 vol%), in terms of inner percentage and relative to boron …
US4804525A - Producing boron carbide - Google Patents
A method of producing submicron size boron carbide powder by heating a reactive mixture containing a boric oxide source and a carbon source at a high temperature for a sufficient length of time to form submicron particles of uniform size.
Norbide HotPressed Boron Carbide
Boron Carbide Technical Data ProductDescription Norbide® HotPressed Boron Carbide (B 4 C) is one of the hardestmaterials known and offers excellentchemical and wear resistance for demanding applications such as blastnozzles, monumentnozzles and armor components. Components made with Norbide® B 4 C offer longer service life which can translate ...
The Olsson Block - a community invention by Anders Olsson
Not one to shy away from a challenge, Anders decided to apply his experience with 3D printing to the problem. First, he created his own boron carbide filament that he could feed into his Ultimaker 2. And then, not knowing what would happen, he started his print...
WO2009070131A2 - Boron carbide production method - Google ...
The invention relates to pure boron carbide (B4C) production method comprising subjecting saccharose (table sugar) to dehydration reaction with the sulphuric acid in the presence of boric acid, obtaining the precursor (12C+48B) comprising carbon and boron as a result of the said dehydration reaction, subjecting the obtained precursor to the heat treatment at a temperature between 1400 0 C …
US8030234B2 - Aluminum boron carbide composite and method ...
An improved aluminum-boron carbide (ABC) composite has been discovered that is comprised of a continuous network of AlB 24 C 4 and boron carbide grains having therein other isolated aluminum-boron carbide reactive phases and at most 2% by volume of isolated metal.
US7854190B2 - Boron carbide component and methods for the ...
A boron carbide body having a graphite content in which the central portion of the body includes more graphite that the region surrounding the central portion and adjacent the exterior surface thereof, and a method for fabricating the boron carbide body.
Boron carbide aluminum driveshaft tube - KURECKA DONALD …
Jan 16, 2003 · [0001] The invention relates to a boron carbide aluminum driveshaft tube. More specifically, it relates to driveshafts where the tubes are designed to achieve a desired level of physical properties for use in automotive applications. BACKGROUND OF THE INVENTION [0002] Automotive driveshafts are carefully engineered to meet vehicle requirements.
Method for preparing boron-carbide articles(Patent) | DOE ...
The process of the present invention is practiced by the steps comprising hot pressing boron carbide powder into article segments or portions in which the segments have a length-to-diameter or width ratio less than 1.5, aligning a plurality of the initially hot-pressed segments in a hot-pressing die with the end surfaces of the segments placed ...
Method of accurate thickness measurement of boron carbide ...
The process of the present invention is practiced by the steps comprising hot pressing boron carbide powder into article segments or portions in which the segments have a length-to-diameter or width ratio less than 1.5, aligning a plurality of the initially hot-pressed segments in a hot-pressing die with the end surfaces of the segments placed in intimate contact with one another, and then hot pressing the …
Robin A. Carden Inventions, Patents and Patent ...
The metal matrix composite of the present invention begins with the preparation of the boron carbide powder by particle size selection in a jet mill. The resulting powder and metal powder are then mixed by blending of powder of all the various elements such as by means of a conventional blender to uniformly mix powdered substances and avoid stratification and settling.
List of French inventions and discoveries - Wikipedia
Weapons and military. It was first used to load the Lebel Model 1886 rifle (invented by Nicolas Lebel ), making it the first military firearm to use smokeless powder ammunition. It is also the first rifle to use full metal jacket bullets as its standard ammunition.
PROCESS FOR MANUFACTURING HIGH DENSITY BORON CARBIDE ...
Feb 27, 2014 · The invention provides a process for manufacturing high density boron carbide by pressureless sintering, enabling to create sintered products of complex shapes and high strength. The robust process of the invention enables to employ low-cost raw powders.
Boron carbide aluminum driveshaft tube - American Axle ...
Apr 29, 2003 · The invention relates to a boron carbide aluminum driveshaft tube. More specifically, it relates to driveshafts where the tubes are designed to achieve a desired level of physical properties for use in automotive applications. BACKGROUND OF THE INVENTION. Automotive driveshafts are carefully engineered to meet vehicle requirements.
US Patent for Reduction of SiCl4 in the presence of BCl3 ...
Mar 17, 2015 · The present invention relates, in general, to the purification of boron trichloride (BCl3). More particularly, the invention relates to a process for minimizing silicon tetrachloride (SiCl4) formation in BCl3 production and/or the removal of SiCl4 in BCl3 product stream by preventing/minimizing the silicon source in the reaction chambers.
Boron-Carbide and Boron Rich Rhobohedral Based Transistors ...
The invention is more particularly directed to 25 ~~~~h~~ object of the present invention is to provide a technique for creating a layer of boron carbide with a boron carbide semiconductor devices and fabrication tech- boron-to-carbon ratio of about 5. The invention is also niques which do not require a …
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