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39 results on '"Huang, Rong-Tan"'

18. Diffusion behavior of the spin valve structure

Author

Huang, Rong-Tan, Chen, Fu-Rong, Kai, Ji-Jung, Tsu, I-Fei, Mao, Sining, and Kai, W.

Subjects
Ferromagnetism -- Research, Rotational motion -- Research, Thin films -- Magnetic properties, Physics
Abstract

Research into NiMn/NiFe/Co/Cu/Co/NiFe/seed layer and NiFe/CoFe/Cu/CoFe/Ru/CoFe/NiFe/NiMn/seed layer is presented. It was established that the diffusion mechanisms of Cu in Co layer and Co in Cu layer are mainly dominated by the grain boundary.

Published
2001

20. Thermal stability of atmospheric pressure plasma jet-deposited ZrO2top coats and sputtered RuAl/RuAlZr/Ru bond coats on Inconel 617

Author

Huang, Rong-Tan, Ke, Yi-En, Lu, Ting-En, and Chen, Yung-I

Abstract

In this study, the feasibility of using ZrO2coatings, fabricated through the atmospheric pressure plasma jet technique, as top coats in thermal barrier systems was explored. Inconel 617 was used as the substrate material, and sputtered laminated RuAl/RuAlZr/Ru was used as the bond coat. >20-μm-thick ZrO2coatings were deposited through several iterations of deposition at 500 °C and annealing at 600 °C; here, ZrO2existed in the tetragonal phase. The tetragonal ZrO2was stable after annealing at up to 700 °C but transformed into a mixture of tetragonal and monoclinic ZrO2phases when annealed at >800 °C. The thermal stability of the ZrO2/RuAl/RuAlZr/Ru/Inconel 617 assembly was evaluated at 800–900 °C in air. The variations in volumetric fractions of the tetragonal and monoclinic ZrO2phases were recorded; 44% of the tetragonal phase remained after 100 h of annealing at 800 °C, whereas 80% of the tetragonal phase had transformed into the monoclinic phase after 4 h of annealing at 900 °C. Observation of BC after annealing at 800 °C indicated that a dense thermally grown oxide scale, comprising O and Al, formed between the ZrO2and RuAl layers, which impeded the inward diffusion of O. The inhibition of O diffusion declined with the crystallization of the thermally grown oxide scale into the δ-Al2O3phase when the annealing time was extended.

Published
2021
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23. Observation of vacancy ordering structure in GaP nanobelts

Author

Tsai, Jin-Sheng, Chen, Fu-Rong, Guo, Gia-Gia, Kai, Ji-Jung, Huang, Gi-Chia, Chen, Chai-Chun, Wang, Ming-San, Huang, Rong-Tan, and Yu, Min-Uan

Subjects
Transmission electron microscopes -- Analysis, Quantum wells -- Properties, Quantum wells -- Analysis, Iron compounds -- Properties, Iron compounds -- Analysis, Physics
Abstract

The semiconductor GaP nanobelts were synthesized with a Fe(sub 2)O(sub 3) catalyst on silicon substrates by thermal evaporation at high temperatures. High-resolution transmission electron microscopy, electron diffraction patterns, and computer simulation was used for analyzing the vacancy ordering structure

Published
2004

24. Contact-Dependent Reliability of Spin Valve Heads

Author

Tsu, I-Fei, Morrone, Augusto, Huang, Rong-Tan, and Chen, Fu-Rong

Subjects
Reliability (Engineering) -- Testing, Electrodiffusion -- Research, Sensors -- Testing, Read/write heads -- Testing, Business, Electronics, Electronics and electrical industries
Abstract

Contact-dependent failure modes were observed in spin valve sensors in nominal current density range of 2 - 5 x [10.sup.7] A/[cm.sup.2] at 70 [degrees] C ambient. At high bias condition, continually decreased quasistatic test (QST) transfer curve amplitude with negligible resistance change was observed in sensors abutted with Ta contact. In contrast, steady resistance rise with relatively unchanged amplitude was seen in Ta/Au/Ta-contact device prior to catastrophic burnout. Void formation is apparent in the Au layer of the burnout device. Locations of the voids show bias polarity dependency, suggesting an electromigration mechanism in the Au layer Index Terms--Contact materials, electrical reliability, electromigration, spin valve.

Published
2000

25. Air Oxidation Behavior of (Fe41Cr15Mo14C12B9Co7Y2)97Ta3 Bulk Metallic Glass.

Author

Kai, Wu, Lee, Chia Chin, Cheng, Fu Pen, Huang, Rong Tan, and Jang, Jason Shian-Ching

Subjects
OXIDATION, METALLIC glasses, ALLOYS, TEMPERATURE, MICROELECTRONICS
Abstract

The oxidation of (Fe41Cr15Mo14C12B9Co7Y2)97Ta3 bulk metallic glass (Fe8-BMG) was investigated in dry air at 500-625 °C. The results showed that the oxidation kinetics of the alloy obeyed the parabolic rate law at T ≥ 550 °C, while the mass gain at 500 °C was extremely small. The oxidation rates of Fe8-BMG increased progressively as the temperature rose, especially when having its value at 600 °C which was comparable to that of the commercial 304L stainless steel. The scales formed on the amorphous steel consisted of granular Cr2O3, and its grain size increased with increasing temperature. [ABSTRACT FROM AUTHOR]

Published
2018
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