Book Description
L'ETUDE THEORIQUE ET EXPERIMENTALE DU DEPOT CHIMIQUE EN PHASE GAZEUSE DU CARBURE DE TITANE, HABITUELLEMENT REALISE A PARTIR DE TETRACHLORURE DE TITANE, DE METHANE ET D'HYDROGENE, A ETE EFFECTUEE EN SE DIFFERENCIANT DU PROCEDE GENERALEMENT EMPLOYE PAR TROIS POINTS PRINCIPAUX: 1) UNE TEMPERATURE DE DEPOT MODEREE, PLUS BASSE QUE CELLES HABITUELLEMENT UTILISEES; 2) UNE PREREDUCTION DU TICL#4 PAR DU TITANE PORTE A PLUS HAUTE TEMPERATURE; 3) L'EMPLOI DU BUTANE COMME HYDROCARUBRE. APRES UNE ETUDE THERMODYNAMIQUE QUI A PERMIS DE RECHERCHER LES CONDITIONS DE DEPOT OPTIMUM, L'ETUDE EXPERIMENTALE A PERMIS DE PRECISER: 1) UNE LIMITATION CINETIQUE DE REDUCTION DES SOUS-CHLORURES QUI N'A PLUS LIEU D'ETRE LORSQUE LE DEBIT DU BUTANE AUGMENTE, CAR ON OBSERVE ALORS UNE REACTION DE DISMUTATION DES SOUS-CHLORURES DE TITANE; 2) UNE LIMITATION CINETIQUE DE DECOMPOSITION DU BUTANE. AINSI LE CARBURE DE TITANE PEUT ETRE DEPOSE NETTEMENT HORS EQUILIBRE EN OPERANT AVEC UNE FORTE SURSATURATION EN REACTIFS. CE QUI PERMET, AVEC LA FAIBLE TEMPERATURE EMPLOYEE, D'OBTENIR DES DEPOTS POLYNUCLEES A GRAINS TRES FINS, PRESENTANT DES MICRODURETES TRES ELEVEES, LORSQUE LE POURCENTAGE DE CHLORE INCORPORE EST FAIBLE ET QU'IL N'Y A NI CARBONE LIBRE NI MICROPOROSITES. LES VITESSES DE DEPOT SONT IMPORTANTES, ENTRE SIX ET DOUZE MICRONS PAR HEURE, DANS LES CONDITIONS DONNANT DE FORTES MICRODURETES
Book Description
ETUDE THERMODYNAMIQUE DU SYSTEME BINAIRE ZR-C, PERMETTANT DE DECRIRE LES VARIATIONS DE L'ENTHALPIE LIBRE DE FORMATION DE ZR::(X)C::(1-X), SOIT PAR UN MODELE EN SUBSTITUTION, SOIT PAR UN MODELE EN SOUS RESEAU
Author: Pascale Salles (auteur en métallurgie).) Publisher: ISBN: Category : Languages : fr Pages : 0
Book Description
Etude thermodynamique du systeme binaire zr-c, permettant de decrire les variations de l'enthalpie libre de formation de zr::(x)c::(1-x), soit par un modele en substitution, soit par un modele en sous reseau
Author: Ahmed Belasri Publisher: Springer Nature ISBN: 9811554447 Category : Technology & Engineering Languages : en Pages : 659
Book Description
This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
Author: A. R. Lansdown Publisher: Pergamon ISBN: Category : Science Languages : en Pages : 150
Book Description
Provides practical advice on the selection of materials for use in applications in which wear-resistance is an important criterion. Each wear situation is clearly defined and detailed guidance is then given on the selection of the most appropriate materials for that situation. This approach ensures that the volume will be of value to the materials technologist, design engineer as well as the non-specialist user seeking a sound working knowledge and understanding of the subject. The work is supplemented by an appendix giving the names and addresses of important companies and institutions operating in the field.
Author: David Adler Publisher: Springer Science & Business Media ISBN: 1489922601 Category : Science Languages : en Pages : 448
Book Description
The Institute for Amorphous Studies was founded in 1982 as the international center for the investigation of amorphous mate rials. It has since played an important role in promoting the und er standing of disordered matter in general. An Institute lecture series on "Fundamentals of Amorphous Materials and Devices" was held during 1982-83 with distinguished speakers from universities and industry. These events were free and open to the public ,and were attended by many representatives of the scientific community. The lectures themselves were highly successful inasmuch as they provided not only formal instruction but also an opportunity for vigorous and stimulating debate. That last element could not be captured within the pages of a book I but the lectures concentrated on the latest advances in the field I which is why their essential contents are he re reproduced in collective form. Together they constitute an interdisciplinary status report of the field. The speakers brought many different viewpoints and a variety of back ground experiences io bear on the problems involved I but though language and conventions vary I the essential unity of the concerns is very clear I as indeed are the ultimate benefits of the many-sided approach.
Author: Robert Salas Publisher: Career Press ISBN: 9781601633422 Category : Body, Mind & Spirit Languages : en Pages : 0
Book Description
In 1969 the U.S. Air Force issued a statement that read' "No UFO reported, investigated and evaluated by the Air Force was ever an indication of threat to our national security." This statement is patently false. It has been proven untrue by the testimony of many military officers and airmen and documentation of incidents involving UFOs and nuclear weapons, testimonies of which the U.S. Air Force was fully aware. Unidentified details many of these testimonies, some for the first time. As partial justification for its position, the Air Force cites a University of Colorado study that was contracted and paid for by federal funds. Unidentified reveals how this study was actually just another part of the plan to cover up the reality of the UFO phenomenon. For the first time, Unidentified publishes evidence that the investigators for the Colorado study knew about the UFO-related missile shutdown incidents but did not investigate them or include them in their final report.
Author: Laurence Gardner Publisher: HarperCollins UK ISBN: 000714296X Category : History Languages : en Pages : 466
Book Description
The Ark of the Covenant is the source of one of the deepest mysteries of the Western world. Laurence Gardner has accessed Rosicrucian archives to reveal where the Ark is, what it is and how this lost secret of the distant past has led to the phenomenal new science of space-time manipulation.
Author: Jean-Paul Piton
Author: Pascale Salles
Author: Pascale Salles (auteur en métallurgie).)
Author: Ahmed Belasri
Author: A. R. Lansdown
Author: David Adler
Author: Robert Salas
Author: Laurence Gardner
Author: Universidade de Coimbra
Author: Clifford E. Stone