Calculation of spinodal decomposition temperature in cubic ternary nitride materials including coherency stress and spontaneous ordering

2002 ◽  
Author(s):  
V.A. Elyukhin ◽  
E.A. Avrutin ◽  
J.H. Marsh ◽  
E.L. Portnoi
Keyword(s):  
Spinodal Decomposition ◽  
Decomposition Temperature ◽  
Coherency Stress ◽  
Ternary Nitride

Single Step Heat Treatment Cycle for Development of Isotropic Fe-Cr-Co Magnets

2012 ◽  
Vol 510-511 ◽  
pp. 315-320 ◽  
Author(s):  
S. Akbar ◽  
Z. Ahmad ◽  
M.S. Awan ◽  
M.N. Sarwar ◽  
M. Farooque
Keyword(s):  
Heat Treatment ◽  
Magnetic Properties ◽  
Spinodal Decomposition ◽  
Permanent Magnets ◽  
Treatment Cycle ◽  
Melting Furnace ◽  
Decomposition Temperature ◽  
Single Step ◽  
Heat Treatment Cycle ◽  
Step Heat Treatment

This study is focused on the development of isotropic Fe-Cr-Co based permanent magnets. Two compositions Fe-25Co-30Cr-3.5Mo-0.8Ti-0.8 and Fe-24 Co-32Cr-0.5Si-0.8V-0.8Ti were tried to optimize by adjusting heat treatment cycle. A modified single step heat treatment cycle was established which made processing easy and quick. Alloys were prepared in tri-arc melting furnace under inert atmosphere of Argon. Samples were solution treated at 1250 °C for 5 hours followed by water quenching. Then a spinodal decomposition heat treatment cycle in the temperature range 620 645 °C was applied in order to produce magnetism in this material. Samples were characterized for metallographic, chemical, structural and magnetic properties using Optical microscope, Scanning electron microscope equipped with Energy dispersive spectrometer, X-ray diffractometer and DC magnetometer. This study reveals that magnetic properties are sensitive to the spinodal decomposition temperature. Only + 5 °C change in temperature from optimum temperature can cause remarkable attenuation in magnetic properties. Magnetic properties of the alloys were achieved by controlling the spinodal decomposition temperature and subsequent cooling rate. The best magnetic properties in Mo and V containing alloys were obtained as 880 Oe (Hc), 7960 G (Br), 2.3 MGOe (BHmax) and 700 Oe (Hc), 7750 G (Br), 1.8 MGOe (BHmax), respectively.

The birth of bubbles by spinodal decomposition: Solving the tiny bubble paradox

2020 ◽  
Author(s):  
Dork Sahagian ◽  
Tamara Carley ◽  
Anja Allabar ◽  
James Gardner ◽  
Ed Lewellin ◽  
...  
Keyword(s):  
Spinodal Decomposition

SPINODAL DECOMPOSITION OF Ni-Ti

1986 ◽  
Vol 47 (C2) ◽  
pp. C2-259-C2-264 ◽  
Author(s):  
R. GRÜNE ◽  
P. HAASEN
Keyword(s):  
Spinodal Decomposition

Steric Inner Structure Control of Fine Particles by Spinodal Decomposition as Shape Regulation Preparation.

1999 ◽  
Vol 115 (6) ◽  
pp. 475-480
Author(s):  
Tatsuo YAMAGUCHI ◽  
Toshiaki NAKAI ◽  
Naoya ASANUMA ◽  
Sachiko ONO ◽  
Kunihiko TAKEDA
Keyword(s):  
Spinodal Decomposition ◽  
Fine Particles ◽  
Structure Control

Microstructural Considerations on the Reliability of 3D Packaging

2012 ◽  
Author(s):  
Zhiheng Huang ◽  
Zhiyong Wu ◽  
Hua Xiong ◽  
Yucheng Ma
Keyword(s):  
Mechanical Behavior ◽  
Grain Growth ◽  
Spinodal Decomposition ◽  
Elastic Energy ◽  
Modeling Approach ◽  
3D Packaging ◽  
Ultrafine Interconnects

Abstract Microstructure and its effect on mechanical behavior of ultrafine interconnects have been studied in this paper using a modeling approach. The microstructure from the processes of solidification, spinodal decomposition, and grain growth in ultrafine interconnects has highlighted its importance. The size, geometry and composition of interconnects as well as the elastic energy can influence microstructure and thus the mechanical behavior. Quantification of microstructure in ultrafine interconnects is a necessary step to establish the linkage between microstructure and reliability.

scholarly journals Preparation and Gas Sensing Properties of PANI/SnO2 Hybrid Material

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1360
Author(s):  
Qiaohua Feng ◽  
Huanhuan Zhang ◽  
Yunbo Shi ◽  
Xiaoyu Yu ◽  
Guangdong Lan
Keyword(s):  
Hybrid Material ◽  
Room Temperature ◽  
Tin Dioxide ◽  
Gas Adsorption ◽  
Gas Sensing ◽  
Oxidative Polymerization ◽  
Environmental Pollutants ◽  
Decomposition Temperature ◽  
Benzene Vapor ◽  
Thermo Gravimetric Analyzer

A sensor operating at room temperature has low power consumption and is beneficial for the detection of environmental pollutants such as ammonia and benzene vapor. In this study, polyaniline (PANI) is made from aniline under acidic conditions by chemical oxidative polymerization and doped with tin dioxide (SnO2) at a specific percentage. The PANI/SnO2 hybrid material obtained is then ground at room temperature. The results of scanning electron microscopy show that the prepared powder comprises nanoscale particles and has good dispersibility, which is conducive to gas adsorption. The thermal decomposition temperature of the powder and its stability are measured using a differential thermo gravimetric analyzer. At 20 °C, the ammonia gas and benzene vapor gas sensing of the PANI/SnO2 hybrid material was tested at concentrations of between 1 and 7 ppm of ammonia and between 0.4 and 90 ppm of benzene vapor. The tests show that the response sensitivities to ammonia and benzene vapor are essentially linear. The sensing mechanisms of the PANI/SnO2 hybrid material to ammonia and benzene vapors were analyzed. The results demonstrate that doped SnO2 significantly affects the sensitivity, response time, and recovery time of the PANI material.

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