scholarly journals Ferromagnetic-like behaviour in bismuth ferrite films prepared by electrodeposition and subsequent heat treatment

RSC Advances ◽  
2017 ◽  
Vol 7 (51) ◽  
pp. 32133-32138 ◽  
Author(s):  
Doga Bilican ◽  
Enric Menéndez ◽  
Jin Zhang ◽  
Pau Solsona ◽  
Jordina Fornell ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Room Temperature ◽  
Bismuth Ferrite ◽  
Subsequent Heat Treatment ◽  
Ferrite Films

BiFeO3 films are achieved by electrodeposition followed by heat-treatment in air. The films show ferromagnetic-like behaviour at room temperature.

Microstructure of Titanium-Aluminides after Thermomechanical Treatment

1990 ◽  
Vol 213 ◽  
Author(s):  
J. Seeger ◽  
C. Hartig ◽  
A. Bartels ◽  
H. Mecking
Keyword(s):  
Heat Treatment ◽  
Dynamic Recrystallization ◽  
Thermomechanical Treatment ◽  
Phase Field ◽  
Room Temperature ◽  
Titanium Aluminides ◽  
Subsequent Heat Treatment ◽  
Grain Sizes ◽  
Room Temperature Ductility ◽  
Residual Amount

ABSTRACTForging in the α2+γ-phase field results in grain refined zones by dynamic recrystallization, but still coarse γ-grains and a residual amount of α2/γ-lamellae are observed. During subsequent heat treatment in the α+γ-phase field the recrystallization leads to inhomogeneous distributions of α2-Ti3Al and grain sizes of γ-TiAl. Due to these inhomogeneities a significant increase of the room temperature ductility is not found.

Order Effect of Vacuum and Ammonia Atmospheres on Aluminium Nitriding by Mechanical Alloying

2012 ◽  
Vol 730-732 ◽  
pp. 936-941 ◽  
Author(s):  
Eduardo Sánchez Caballero ◽  
J. Cintas ◽  
M. Herrera-García ◽  
Francicso Gomez Cuevas ◽  
Juan M. Montes
Keyword(s):  
Heat Treatment ◽  
Mechanical Alloying ◽  
Room Temperature ◽  
Order Effect ◽  
Milling Process ◽  
Subsequent Heat Treatment ◽  
Aluminium Powder ◽  
Xrd Study ◽  
Aluminium Lattice

Aluminium powder was milled under vacuum and/or ammonia atmospheres, in order to evaluate the effect of the order of the atmospheres on the amount of nitrides appearing in the powder after a subsequent heat treatment. All milling experiences were carried out at room temperature for 5 h. The XRD study of sintered powders showed that important amounts of AlN appeared after heating. The use of vacuum and ammonia flow allows controlling the percentage of N rich phases formed. Moreover, the capacity of incorporating nitrogen to the aluminium lattice is very influenced by the vacuum and ammonia flow atmospheres order during the milling process.

Annealing Effect on Microstructure and Coercivity of YCo5 Nanoparticles Obtained by Mechanical Milling

2009 ◽  
Vol 68 ◽  
pp. 122-126
Author(s):  
José Trinidad Elizalde Galindo ◽  
Reiko Sato Turtelli ◽  
Roland Grössinger ◽  
José Andrés Matutes-Aquino
Keyword(s):  
Heat Treatment ◽  
Exchange Interaction ◽  
Mechanical Milling ◽  
Room Temperature ◽  
Hysteresis Loops ◽  
Annealing Effect ◽  
Subsequent Heat Treatment ◽  
High Coercivity ◽  
Crystallite Sizes

Nanocrystalline YCo5 powders with high coercivity were prepared by mechanical milling and subsequent heat treatment at 820 °C for different annealing times, ta = 2.5, 3.0, 3.5 and 4.5 min, obtaining average crystallite sizes of <D>  17, 19, 32 and 39 nm., respectively. The coercivity values were determined from the hysteresis loops measured at maxima fields of Hm = 5 and 20 T. The highest coercivity was obtained for the sample exhibiting <D>  19 nm, where at room temperature and Hm = 5 T, the coercivity value is of 9.0 kOe. At 77 K and Hm = 5 T, the coercivity increase to 11.8 kOe and for Hm = 20 T, a higher value such as 13.1 kOe was found. The Ms/Mr ratio is enhanced to 0.62 indicating the occurrence of exchange interaction among nanocrystalline magnets.

The Structure and Magnetic Properties of NiZn-Ferrite Films Deposited by Magnetron Sputtering at Room Temperature

2013 ◽  
Vol 690-693 ◽  
pp. 1702-1706 ◽  
Author(s):  
Shuang Jun Nie ◽  
Hao Geng ◽  
Jun Bao Wang ◽  
Lai Sen Wang ◽  
Zhen Wei Wang ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Magnetron Sputtering ◽  
Saturation Magnetization ◽  
Room Temperature ◽  
Oxygen Flow ◽  
Flow Ratio ◽  
Study Results ◽  
Ferrite Thin Films ◽  
Ferrite Films

NiZn-ferrite thin films were deposited onto silicon and glass substrates by radio frequency magnetron sputtering at room temperature. The effects of the relative oxygen flow ratio on the structure and magnetic properties of the thin films were investigated. The study results reveal that the films deposited under higher relative oxygen flow ratio show a better crystallinity. Static magnetic measurement results indicated that the saturation magnetization of the films was greatly affected by the crystallinity, grain dimension, and cation distribution in the NiZn-ferrite films. The NiZn-ferrite thin films with a maximum saturation magnetization of 151 emucm-3, which is about 40% of the bulk NiZn ferrite, was obtained under relative oxygen flow ratio of 60%.

Combination of hot isostatic pressing and subsequent heat treatment for additively manufactured Zr-1Mo components

2021 ◽  
Vol 285 ◽  
pp. 129123
Author(s):  
Xiaohao Sun ◽  
Debao Liu ◽  
Minfang Chen ◽  
Weiwei Zhou ◽  
Naoyuki Nomura ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Hot Isostatic Pressing ◽  
Subsequent Heat Treatment ◽  
Isostatic Pressing
Sign in / Sign up

Export Citation Format

Share Document