✦ LIBER ✦

Inhibition of the oxidation of carbon-carbon composites by bromination

✍ Scribed by C.T. Ho; D.D.L. chung

Publisher: Elsevier Science
Year: 1990
Tongue: English
Weight: 948 KB
Volume: 28
Category: Article
ISSN: 0008-6223
DOI: 10.1016/0008-6223(90)90329-w

No coin nor oath required. For personal study only.

✦ Synopsis

Bromination by exposure to bromine vapor at room temperature was effective for inhibiting the oxidation of carbon-carbon composites in the form of PAN-based carbon fibers impregnated with resin. which was subsequently carbonized at 1000 or 2000°C. The oxidation rate was decreased by up to 43%. In addition. electrical resistivity was decreased by up to 39% However. the tensile modulus was decreased by 16-1795 and tensile strength was decreased by 17-20s; the ductility was not affected. The increased oxidation resistance may be due to bromine adsorption or the electron transfer from graphite to bromine. The bromine resided in the matrix of the composite. particularly in pores within the matrix. Bromination was also attempted by the electrochemical method, but it resulted in negligible weight uptake in the carbon-carbon composite. Carbon-carbon composites that had been graphitized at 2700°C were damaged by bromination.

📜 SIMILAR VOLUMES

Oxidation behavior of carbon-carbon comp

Oxidation behavior of carbon-carbon composites

✍ Chang Heh-Won; Robert M. Rusnak 📂 Article 📅 1979 🏛 Elsevier Science 🌐 English ⚖ 426 KB

This study investigates the oxidation mechanisms of carbon-carbon composite materials of the type used for aircraft brakes. The rate-controlling steps for oxidation at temperatures ranging between 450 and 750°C were determined by measuring activation energies of composite samples in bulk form and in

Contribution of oxidation to the wear of

Contribution of oxidation to the wear of carbon-carbon composites

✍ H.W. Chang; R.M. Rusnak 📂 Article 📅 1978 🏛 Elsevier Science 🌐 English ⚖ 340 KB

An investigation was made of the effects of oxidation on the wear of carbon-carbon composites for aircraft brake materials. Wear tests were performed on samples under various oxygen partial pressures, and measurements were made of wear rates in weight and thickness. Wear rate was found to increase w

Oxidation of carbon/carbon composites—a

Oxidation of carbon/carbon composites—a theoretical analysis

✍ Krishan L. Luthra 📂 Article 📅 1988 🏛 Elsevier Science 🌐 English ⚖ 894 KB

Characterization of carbon-carbon compos

Characterization of carbon-carbon composites—II: Oxidation behaviour

✍ P. Ehrburger; J. Lahaye; C. Bourgeois 📂 Article 📅 1981 🏛 Elsevier Science 🌐 English ⚖ 558 KB

Carbon-carbon composites made from ex-acrylic fibres and pyrocarbon matrices have been gasified in air in order to investigate their resistance to oxidation. The carbon fibres and the surrounding pyrocarbon layers are preferentially oxidized due to a catalytic process. The importance of the catalyti

Influence of matrix precursor on the oxi

Influence of matrix precursor on the oxidation behavior of carbon-carbon composites

✍ T.L. Dhami; O.P. Bahl; L.M. Manocha 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 877 KB

Carbon-carbon composites have been made using PAN-and pitch-based carbon fibers as reinforcement, and the carbon matrix has been derived from phenolic resin (R) and coal tar pitch (P) and a mixture of the two. The temperature of initiation of oxidation in the case of carbonized composites is about l

131. Oxidation of carbon fibre/carbon co

131. Oxidation of carbon fibre/carbon composite

✍ S. Kimura; Y. Shibusa; H. Tanaka; E. Yasuda 📂 Article 📅 1976 🏛 Elsevier Science 🌐 English ⚖ 126 KB

strains (about 2%) have been prepared and high perforreported for this graphitization that glassy carbon (GC) mance carbon fiber reinforced composites (CFRP) were constituting the matrix possibly changed to graphite due obtained using these fibers. The fibers have been prepared to the internal stres