Thermally-induced phase transformation sequence of arc evaporated Ta–Al–N coatings

2016 ◽  
Vol 113 ◽  
pp. 75-78 ◽  
Author(s):  
C.M. Koller ◽  
A. Kirnbauer ◽  
R. Rachbauer ◽  
S. Kolozsvári ◽  
P.H. Mayrhofer
Keyword(s):  
Phase Transformation ◽  
Thermally Induced ◽  
Transformation Sequence

Transformation behavior of yttria stabilized tetragonal zirconia polycrystal–TiB2 composites

2001 ◽  
Vol 16 (7) ◽  
pp. 2158-2169 ◽  
Author(s):  
B. Basu ◽  
J. Vleugels ◽  
O. Van Der Biest
Keyword(s):  
Thermal Expansion ◽  
Phase Transformation ◽  
Low Temperature ◽  
Tetragonal Zirconia ◽  
Mechanical Analysis ◽  
Transformation Behavior ◽  
Thermal Expansion Data ◽  
Thermally Induced ◽  
First Time ◽  
Tetragonal Zirconia Polycrystal

The objective of the present article is to study the influence of TiB2 addition on the transformation behavior of yttria stabilized tetragonal zirconia polycrystals (Y-TZP). A range of TZP(Y)–TiB2 composites with different zirconia starting powder grades and TiB2 phase contents (up to 50 vol%) were processed by the hot-pressing route. Thermal expansion data, as obtained by thermo-mechanical analysis were used to assess the ZrO2 phase transformation in the composites. The thermal expansion hysteresis of the transformable ceramics provides information concerning the transformation behavior in the temperature range of the martensitic transformation and the low-temperature degradation. Furthermore, the transformation behavior and susceptibility to low-temperature degradation during thermal cycling were characterized in terms of the overall amount and distribution of the yttria stabilizer, zirconia grain size, possible dissolution of TiB2 phase, and the amount of residual stress generated in the Y-TZP matrix due to the addition of titanium diboride particles. For the first time, it is demonstrated in the present work that the thermally induced phase transformation of tetragonal zirconia in the Y-TZP composites can be controlled by the intentional addition of the monoclinic zirconia particles into the 3Y-TZP matrix.

Phase transformation sequence of amorphous ferrochrome alloy electrodeposit

2019 ◽  
Vol 780 ◽  
pp. 743-748
Author(s):  
Cheng Liu ◽  
Lei Jin ◽  
Fang-Zu Yang ◽  
Zhong-Qun Tian
Keyword(s):  
Phase Transformation ◽  
Transformation Sequence ◽  
Ferrochrome Alloy

scholarly journals Real-time observation of the thermally-induced phase transformation in GeTe and its thermal expansion properties

2019 ◽  
Vol 165 ◽  
pp. 327-335 ◽  
Author(s):  
Xuan Quy Tran ◽  
Min Hong ◽  
Hiroshi Maeno ◽  
Youichirou Kawami ◽  
Takaaki Toriyama ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Phase Transformation ◽  
Real Time ◽  
Thermally Induced ◽  
Time Observation ◽  
Real Time Observation

Multiscale Surface Patterning of Zirconia by Picosecond Pulsed Laser Irradiation

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Yuka Yamamuro ◽  
Tomotaka Shimoyama ◽  
Isao Yamashita ◽  
Jiwang Yan
Keyword(s):  
Phase Transformation ◽  
Laser Irradiation ◽  
Pulsed Laser ◽  
Surface Patterning ◽  
Yttria Stabilized Zirconia ◽  
Surface Structures ◽  
Stabilized Zirconia ◽  
Periodic Surface ◽  
Thermally Induced ◽  
Pulsed Laser Irradiation

Abstract Irradiation of yttria-stabilized zirconia (YSZ) was performed by a picosecond pulsed laser to investigate the possibility for multiscale surface patterning. Nanoscale laser-induced periodic surface structures (LIPSS) were successfully generated inside microscale grooves over a large surface area under specific conditions. A thermally induced phase transformation of YSZ was identified after laser irradiation, and this phase transformation was restrained by reducing the laser power or the number of irradiations. Moreover, it was found that the generation of LIPSS greatly changed the surface wettability of YSZ. These results demonstrated the possibility of creating zirconia hybrid patterns with high functionality, which may expand the applications of YSZ in industry.

scholarly journals Atomistic Study on Size Effects in Thermally Induced Martensitic Phase Transformation of NiTi

2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
Sourav Gur ◽  
George N. Frantziskonis
Keyword(s):  
Thin Films ◽  
Phase Transformation ◽  
Size Effects ◽  
Martensite Phase ◽  
Martensitic Phase ◽  
Martensitic Phase Transformation ◽  
Phase Fraction ◽  
Interatomic Potentials ◽  
Thermally Induced ◽  
Atomistic Study

The atomistic study shows strong size effects in thermally induced martensitic phase transformation evolution kinetics of equiatomic NiTi shape memory alloys (SMAs). It is shown that size effects are closely related to the presence of free surfaces; thus, NiTi thin films and nanopillars are studied. Quasi-static molecular dynamics simulations for several cell sizes at various (constant) temperatures are performed by employing well-established interatomic potentials for NiTi. The study shows that size plays a crucial role in the evolution of martensite phase fraction and, importantly, can significantly change the phase transformation temperatures, which can be used for the design of NiTi based sensors, actuators, or devices at nano- to microscales. Interestingly, it is found that, at the nanometer scale, Richard’s equation describes very well the martensite phase fraction evolution in NiTi thin films and nanopillars as a function of temperature.

Thermally induced phase transformation of pearl powder

2013 ◽  
Vol 33 (4) ◽  
pp. 2046-2049 ◽  
Author(s):  
Guoqing Zhang ◽  
Yili Guo ◽  
Ju Ao ◽  
Jing Yang ◽  
Guanglie Lv ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Thermally Induced

Phase Transformation of Hexacelsians Doped with Li, Na and Ca

2005 ◽  
Vol 494 ◽  
pp. 107-112 ◽  
Author(s):  
V. Dondur ◽  
R. Dimitrijević ◽  
A. Kremenović ◽  
Lj. Damjanović ◽  
M. Kićanović ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Thermal Treatment ◽  
Maximum Temperature ◽  
29Si Mas Nmr ◽  
Thermally Induced ◽  
Synthesis Conditions ◽  
Nmr Method ◽  
Lta Zeolite ◽  
Dsc Method ◽  
Heat Of Transformation

A series of hexacelsians with different compositions were synthesized by thermally induced transformation of a LTA zeolite. Various forms of hexacelsians have been characterized by XRPD, IR, Raman and 29Si MAS NMR method. The phase transformation ab hexacelsian was investigated by DSC method. This phase transformation is sensitive to synthesis conditions, doping and thermal treatment. The peak maximum temperature, Tm, varies from 302 up to 353 oC. Heat of transformation changes from 0.42 to 1.77 kJ/mol.

Effect of Low-Temperature Aging on Thermally-Induced Phase Transformation of NiTi Wire with a Wide Range of Grain Sizes

2021 ◽  
Vol 1042 ◽  
pp. 9-16
Author(s):  
Zhi Hao Zhao ◽  
Jian Ping Lin ◽  
Jun Ying Min ◽  
Yong Hou ◽  
Bo Sun
Keyword(s):  
Grain Size ◽  
Phase Transformation ◽  
Low Temperature ◽  
Thermally Induced ◽  
Grain Sizes ◽  
Average Grain Size ◽  
Wide Range ◽  
Low Temperature Aging ◽  
Niti Wires ◽  
Temperature Aging

Thermally-induced phase transformation (PT) is of significance and value to the application of NiTi alloy components. Low-temperature aging (LTA) treatment was used to alter PT characteristics of NiTi alloys avoiding undesirable grain growth. Effect of LTA on PT of NiTi wires with a wide range of grain sizes from 34 nm to 8021 nm was investigated in this study. As the average grain size varies from 34 to 217 nm, the temperature of the B2↔R transformation increase as a result of LTA, and the increasing effect is more obvious at a larger grain size. For NiTi alloys with average grain sizes ranging from 523 to 1106 nm, transformation sequence changes from B2↔B19' to B2↔R due to LTA. For the sample with an average grain size of 2190 nm, the B2↔B19' transformation is replaced by B2↔R←B19' after LTA. When the average grain size is larger than 2190 nm, transformation sequence changes from B2↔B19' to B2↔R↔B19' after LTA. Transmission emission microscope observations reveal that the above-mentioned PT behavior correlates with the coupled effect of grain size and precipitation. The precipitation of Ni4Ti3 in the grains with a size smaller than ~150 nm is inhibited after LTA, the temperature of B2→R of samples with average GS smaller than ~150 nm still is elevated due to the inhomogeneous grain size of NiTi wires.

Sign in / Sign up

Export Citation Format

Share Document