Author: Christopher DellaCortePublisher:
ISBN:
Category : Ceramics
Languages : en
Pages : 14
Book Description
Vickers Indentation Hardness of Stoichiometric and Reduced Single Crystal TiO2 (rutile) from 25 to 800 C
Author: Christopher DellaCortePublisher:
ISBN:
Category : Ceramics
Languages : en
Pages : 14
Book Description
NASA Technical Memorandum
Author: Scientific and Technical Aerospace Reports
Author: Thermal Spray 2001
Author: Christopher C. BerndtPublisher: ASM International
ISBN: 1615032304
Category : Technology & Engineering
Languages : en
Pages : 1338
Book Description
Government Reports Announcements & Index
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1434
Book Description
New Directions in Tribology
Author: Ian M. HutchingsPublisher: Wiley-Blackwell
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 520
Book Description
This volume contains 35 present ations on the developments and advances made in tribology. Subjects discussed include: surface engineering; rolling bearings; thermal effects in tribo-systems; and environmental issues in tribology.
Government reports annual index
Author: Ultrahigh Vacuum Metalorganic Chemical Vapor Deposition and in Situ Characterization of Nanoscale Titanium Dioxide Films
Author: Polly Wanda ChuPublisher:
ISBN:
Category :
Languages : en
Pages : 436
Book Description
Thin titanium dioxide films were produced by metalorganic chemical vapor deposition on sapphire(0001) in an ultrahigh vacuum (UHV) chamber. A method was developed for producing controlled submonolayer depositions from titanium isopropoxide precursor. Film thickness ranged from 0.1 to 2.7 nm. In situ X-ray photoelectron spectroscopy (XPS) was used to determine film stoichiometry with increasing thickness. The effect of isothermal annealing on desorption was evaluated. Photoelectron peak shapes and positions from the initial monolayers were analyzed for evidence of interface reaction. Deposition from titanium isopropoxide is divided into two regimes: depositions below and above the pyrolysis temperature. This temperature was determined to be 300 deg C. Controlled submonolayers of titanium oxide were produced by cycles of dosing with titanium isopropoxide vapor below and annealing above 300 deg C. Precursor adsorption below the pyrolysis temperature was observed to saturate after 15 minutes of dosing. The quantity absorbed was shown to have an upper limit of one monolayer. The stoichiometry of thin films grown by the cycling method were determined to be TiO2. Titanium dioxide film stoichiometry was unaffected by isothermal annealing at 700 deg C. Annealing produced a decrease in film thickness. This was explained as due to desorption. Desorption ceased at approximately 2.5 to 3 monolayers, suggesting bonding of the initial monolayers of film to sapphire is stronger than to itself. Evidence of sapphire reduction at the interface by the depositions was not observed. The XPS O is peak shifted with increased film thickness. The shifts were consistent with oxygen in sapphire and titanium dioxide having different O is photoelectron peak positions. Simulations showed the total shifts for thin films ranging in thickness of 0.1 to 2.7 nm to be -0.99 to -1.23 eV. Thick films were produced for comparison.
Sapphire
Author: Elena R. DobrovinskayaPublisher: Springer Science & Business Media
ISBN: 0387856951
Category : Technology & Engineering
Languages : en
Pages : 493
Book Description
By the second half of the twentieth century, a new branch of materials science had come into being — crystalline materials research. Its appearance is linked to the emergence of advanced technologies primarily based on single crystals (bulk crystals and films). At the turn of the last century, the impending onset of the “ceramic era” was forecasted. It was believed that ceramics would play a role comparable to that of the Stone or Bronze Ages in the history of civilization. Naturally, such an assumption was hypothetical, but it showed that ceramic materials had evoked keen interest among researchers. Although sapphire traditionally has been considered a gem, it has developed into a material typical of the “ceramic era.” Widening the field of sapphire application necessitated essential improvement of its homogeneity and working characteristics and extension of the range of sapphire products, especially those with stipulated properties including a preset structural defect distribution. In the early 1980s, successful attainment of crystals with predetermined char- teristics was attributed to proper choice of the growth method. At present, in view of the fact that the requirements for crystalline products have become more str- gent, such an approach tends to be insufficient. It is clear that one must take into account the physical–chemical processes that take place during the formation of the real crystal structure, i.e., the growth mechanisms and the nature and causes of crystal imperfections.
Ceramic Coatings
Author: Feng ShiPublisher: BoD – Books on Demand
ISBN: 9535100831
Category : Technology & Engineering
Languages : en
Pages : 300
Book Description
The main target of this book is to state the latest advancement in ceramic coatings technology in various industrial fields. The book includes topics related to the applications of ceramic coating covers in enginnering, including fabrication route (electrophoretic deposition and physical deposition) and applications in turbine parts, internal combustion engine, pigment, foundry, etc.