Nova Floresta : ou silva de varios apophtegmas e ditos sentenciosos espirituaes e moraes : com reflexoens, em que o util da doutrina fe ... /

Mode of access: Internet.

Documentos inéditos ó muy raros para la historia de México,

Vols. 6-36 edited by Genaro García.

Evaluation of fe oxide-coated granular activated carbon for removal and recovery of Cu(II) and Cr(VI) from aqueous solution /

"April 1994."--Cover.

Colección de documentos inéditos del Archivo General de la Corona de Aragón.

Editors: t. 1-17, Próspero de Bofarull y Mascaró.--t. 18-40, Manuel de Bofarull y de Sartorio.--t. 41, Francisco de Bofarull y Sans.

Operator's and organizational maintenance manual for disperser and riot control agent, manually carried, CR, M36 (NSN 1365-00-283-9046).

"August 1980."

Antenna support AB-38B/CR.

"January 1952."

Colección de documentos inéditos para la historia de España.

Mode of access: Internet.

Boron solubility in Fe-Cr-B cast irons

Boron solubility in the as-cast and solution treated martensite of Fe-Cr-B cast irons, containing approximately 1.35 wt.% of boron, 12 wt.% of chromium, as well as other alloying elements, has been investigated using conventional microanalysis. The significant microstructural variations after tempering at 750 degreesC for 0.5-4 h, compared with the original as-cast and solution treated microstructures, indicated that the matrix consisted of boron and carbon supersaturated solid solutions. The boron solubility detected by electron microprobe was between 0.185-0.515 wt.% for the as-cast martensite and 0.015-0.0589 wt.% for the solution treated martensite, much higher than the accepted value of 0.005 wt.% in pure iron. These remarkable increases are thought to be associated with some metallic alloying element addition, such as chromium, vanadium and molybdenum, which have atomic diameters larger than iron, and expand the iron lattice to sufficiently allow boron atoms to occupy the interstitial sites in iron lattice. (C) 2002 Elsevier Science B.V. All rights reserved.

Transpassivation of Fe-Cr-Ni stainless steels

A transpassivation model was proposed for Fe–Cr–Ni stainless steels. In this model, the important steps and processes involved in transpassivation were illustrated. With some reasonable assumptions, transpassivation behaviours were predicted, such as the changes in film composition, film thickness, anodic current density and AC impedance spectrum in transpassive and secondary passive regions. It was demonstrated that these theoretical predictions were in good agreement with experimentally observed transpassivity of Fe–Cr–Ni stainless steels.