Results 231 to 240 of about 3,110,730 (312)

Hot corrosion behaviour of yttrium and aluminium modified wear resistance coating alloy in mixed sulphate at 900 °C

, 2020
The wear resistance coating alloy Tribaloy T-900 modified by aluminium and yttrium was prepared by mechanical alloying. The hot corrosion behaviour of modified and unmodified alloys was investigated at 900 °C.
A. Rehman, M. S. Bidabadi, Y. Liang, Zhengdong Yu, Chi Zhang, Hao Chen, Z. G. Yang   +6 more
semanticscholar   +1 more source

Transparent yttrium oxide ceramics

Materials Research Bulletin, 1967
Abstract Transparent discs of yttrium oxide, one centimeter in diameter by several millimeters thick, have been produced by hot forging under vacuum at 950°C and 10,000–12,000 psi for 48 hours. Lithium fluoride, required to produce full transparency, is eliminated during the sintering process.
R.A. Lefever, John Matsko
openaire   +1 more source

Fe-Mn (oxyhydr)oxides as an indicator of REY enrichment in deep-sea sediments from the central North Pacific

Ore Geology Reviews, 2019
Nowadays, pelagic sediments are globally explored as a potential resource of rare earth elements and yttrium (termed as REY), and have received unprecedented attention. However, the formation mechanism of REY-rich deep-sea mud remains controversial.
Jianlin Liao, Xiaoming Sun, Zhong-wei Wu, Rina Sa, Yao Guan, Yang Lu, Dengfeng Li, Y. Liu, Yinan Deng, Yuguan Pan   +9 more
semanticscholar   +1 more source

Nanostructured Yttrium Oxide Obtained by Hydrolysis of Yttrium Sulfate

Materials Science Forum, 2019
Modern functional metal oxide materials are based upon the use of nanostructured particles. In recent years materials on the basis of yttrium oxide find ever-widening application. The properties of yttrium oxide depend heavily on precursors and synthesis conditions. One of the poorly investigated precursors is yttrium sulfate.
Viacheslav V. Avdin, Valeria V. Trunova, Aleksandra V. Bulanova   +2 more
openaire   +1 more source

Anion exchange separation and determination of yttrium in uranium oxide — Yttrium oxide mixture

Journal of Radioanalytical Chemistry, 1983
A procedure has been developed for quantitative separation of yttrium from uranium by anion exchange from nearly saturated NH4Cl solution in 0–2N HCl medium. Apparently no organic matter is leached out during the separation as yttrium could be determined by EDTA titration without resorting to fuming with perchloric acid before titration.
G. H. Rizvi, N. K. Chaudhuri, R. K. Rastogi, S. K. Patil   +3 more
openaire   +1 more source

Self-diffusion of yttrium in monocrystalline yttrium oxide: Y2O3

Journal of Solid State Chemistry, 1980
Abstract Yttrium self-diffusion in monocrystalline yttrium oxide (Y2O3) is studied by means of the classical radio tracer technique. The few reliable diffusion data obtained in the temperature range 1600–1700°C lead to the following diffusion coefficient D=3.5×10 −9 exp − 72 RT ( kcal/mole ) m 2 sec −1 ...
openaire   +2 more sources

Air oxidation of yttrium and some yttrium-base alloys

Journal of the Less Common Metals, 1964
Abstract An investigation was made of the air oxidation behavior of yttrium metal of 99.9% purity at temperatures between 500° and 1400°C. An oxide layer formed on the metal surface affords excellent protection against oxidation up to about 875°C but this film breaks down at higher temperatures, resulting in complete failure of the specimen within a ...
J.A. Haefling, F.A. Schmidt, O.N. Carlson   +2 more
openaire   +1 more source

Compressive Properties of Yttrium Oxide

Journal of the American Ceramic Society, 1996
Compressive properties of polycrystalline yttrium oxide (Y 2 O 3 ) were studied by slow‐strain‐rate experiments (ε= 5.7 × 10 –6 s −1 ) between room temperature and 1600°C ...
Özer Ünal, Mufit Akinc
openaire   +1 more source

Electrochemical deposition of yttrium oxide

Journal of Materials Chemistry, 2000
Thin films of yttrium hydroxide were obtained from aqueous Y(NO3)3 and YCl3 salt solutions via cathodic electrodeposition. The electrodeposition yield was studied under various experimental conditions. By varying the current density, deposition time and yttrium salt concentration, the amount of the deposited material could be controlled ...
Igor Zhitomirsky, Anthony Petric
openaire   +1 more source

Sintering zirconia with yttrium oxide

Refractories, 1975
An investigation was carried out of the sintering of zirconia containing 4–15 mole % yttrium oxide in which it was confirmed that the sintering of the materials begins at 500°C.
A. G. Karaulov, I. N. Rudyak
openaire   +1 more source