Publication

Oxidation Behavior of Boron-Carbide

Christoph Hollenstein
1990
Journal Articles

Abstract

The oxidation behaviour of various boron-carbide samples have been studied by photoelectron spectroscopy. The exposure of sputter-cleaned surfaces to molecular oxygen at room temperature did not cause a measurable surface oxidation. An increased reactivity has been found by irradiating boron carbide with energetic oxygen ions. The highest reactivity against oxidation was obtained during the growth of a boron-carbide surface phase which revealed a marked oxygen gettering effect.

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Christoph Hollenstein
1990
Journal Articles

Abstract

Official source

Related concepts (32)

Boron

Boron is a chemical element with the symbol B and atomic number 5. In its crystalline form it is a brittle, dark, lustrous metalloid; in its amorphous form it is a brown powder. As the lightest element of the boron group it has three valence electrons for forming covalent bonds, resulting in many compounds such as boric acid, the mineral sodium borate, and the ultra-hard crystals of boron carbide and boron nitride. Boron is synthesized entirely by cosmic ray spallation and supernovae and not by stellar nucleosynthesis, so it is a low-abundance element in the Solar System and in the Earth's crust.

Silicon carbide

Silicon carbide (SiC), also known as carborundum (ˌkɑrbəˈrʌndəm), is a hard chemical compound containing silicon and carbon. A semiconductor, it occurs in nature as the extremely rare mineral moissanite, but has been mass-produced as a powder and crystal since 1893 for use as an abrasive. Grains of silicon carbide can be bonded together by sintering to form very hard ceramics that are widely used in applications requiring high endurance, such as car brakes, car clutches and ceramic plates in bulletproof vests.

Boron nitride

Boron nitride is a thermally and chemically resistant refractory compound of boron and nitrogen with the chemical formula BN. It exists in various crystalline forms that are isoelectronic to a similarly structured carbon lattice. The hexagonal form corresponding to graphite is the most stable and soft among BN polymorphs, and is therefore used as a lubricant and an additive to cosmetic products. The cubic (zincblende aka sphalerite structure) variety analogous to diamond is called c-BN; it is softer than diamond, but its thermal and chemical stability is superior.

Related publications (6)

Oxidation Behavior of Boron-Carbide

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Origin of fine structure in Si 2p photoelectron spectra at silicon surfaces and interfaces

Design of a variable-temperature scanning tunneling microscope to study reaction intermediates in heterogeneous catalysis

Sharp high-resolution Si 2p core level on the Sb-terminated Si(111) surface: Evidence for charge transfer