Browsing by Author "TU, GC"

Now showing 1 - 9 of 9

A STUDY OF CORROSION FATIGUE BEHAVIOR OF ANODIZED AND UNANODIZED 2024-T3 ALUMINUM-ALLOY
(1991-03-01)
TU, GC
;
HWANG, RY
;
CHEN, IT
;
交大名義發表
;
機械工程學系
The corrosion fatigue (CF) behaviour, under constant deflection bending conditions with a pulsating tension stress form, of 2024-T3 aluminium alloy, unanodized and anodized to form a thick porous film, in 3.5% NaCl solution has been investigated. It was found that E(corr) varies very little until specimen fracture under low frequency CF conditions, whereas E(corr) drops rapidly when approaching the later fracturing stage of the CF process under high-frequency conditions for unanodized specimens. However, a slow drop in E(corr) was detected from the commencement of the CF process, and lasted up to a much more rapid drop at a later fracturing stage for the anodized specimen. This behaviour presumably can be explained by the cracking of the anodic film and the theory of imperfect recovery of the surface film. It is suggested that the E(corr) monitoring technique may be useful for determining the remnant CF life for existing structural parts of this alloy or other aluminium alloys regardless of whether or not they are anodized. Furthermore, the T3 temper provides a microstructure which may retard main-crack formation and penetration in the CF process of the anodized alloy, thus mitigating partly the negative effect of the readily crackable anodic film.
A STUDY OF THE FEATURELESS ZONE IN RAPIDLY-SOLIDIFIED GAS-ATOMIZED ALUMINUM-ALLOY POWDER
(1991-10-01)
TU, GC
;
CHEN, IT
;
CHUNG, MS
;
交大名義發表
;
材料科學與工程學系
HARD ANODIZING OF 2024 ALUMINUM-ALLOY USING PULSED DC AND AC POWER
(1987-05-01)
TU, GC
;
HUANG, LY
;
交大名義發表
;
機械工程學系
;
National Chiao Tung University
HIGH-TC SUPERCONDUCTING OXIDE FILM PREPARED BY SPRAY PYROLYSIS COATING
(1990-11-01)
KOO, HS
;
TU, GC
;
CHU, JJ
;
LEE, WH
;
WU, PT
PREPARATION AND CHARACTERIZATION OF TL-BA-CA-CU-O SUPERCONDUCTING FILMS BY SPRAY-PYROLYSIS AND TL-DIFFUSION TECHNIQUE
(1994-01-01)
KOO, HS
;
TU, GC
;
TSENG, TY
;
材料科學與工程學系
;
電子工程學系及電子研究所
The present work reports that highly c-axis-oriented Tl-Ba-Ca-Cu-O superconducting films with zero-resistance temperature up to 112 K were successfully prepared using the spray pyrolysis technique with a subsequent Tl-diffusion treatment. The insulating Ba-Ca-Cu-O precursor films (Ba:Ca:Cu = 2:2:3) were made by spray deposition of the related metal nitrate solution on a preheated (300-degrees-400-degrees-C) MgO(001) single-crystal substrate. The presence of the superconducting phases of the resultant films depended strongly on the types of Tl sources used. The results showed that the formation of the superconducting phases could be achieved more readily by using the bulk Tl-Ba-Ca-Cu-O rather than Tl2O3 as a Tl source. In other words, the low Tl content in the TlBaCaCuO bulk source with a resulting low Tl-vapor pressure is favorable for the formation of a higher T(c) superconducting phase. The dominant phases in the prepared films were mainly TlBa2Ca2Cu3Oy(1223 phase) and Tl2Ba2CaCu2Oy(2212 phase). The critical current density of a film with a nearly single-phase(1223) structure was measured to be 1.2 X 10(4) A/cm2 at 77 K under zero magnetic field.
PREPARATION OF HIGH-TC SUPERCONDUCTING BI-PB-SR-CA-CU-O CERAMICS BY THE METHOD OF THERMAL-DECOMPOSITION OF AN ETHYLENE DIAMINE TETRAACETATE COLLOIDAL SUSPENSION
(1990-03-01)
TU, GC
;
CHEN, FH
;
KOO, HS
;
交大名義發表
;
材料科學與工程學系
THE EFFECT OF ANODIZING ON THE CORROSION FATIGUE BEHAVIOR OF 2024-T3 ALUMINUM-ALLOY
(1990-10-01)
TU, GC
;
CHEN, IT
;
HWANG, RY
;
交大名義發表
;
機械工程學系
THE EFFECT OF NB-ADDITION ON THE LL(2) PRECIPITATES OF RAPIDLY-SOLIDIFIED AL-CR-ZR ALLOY
(1995-12-15)
CHUANG, MS
;
TU, GC
;
交大名義發表
;
材料科學與工程學系
;
National Chiao Tung University
THE EFFECT OF TI-ADDITION ON THE L12 PRECIPITATES OF RAPIDLY-SOLIDIFIED AL-CR-ZR ALLOY
(1994-11-01)
CHUANG, MS
;
TU, GC
;
交大名義發表
;
材料科學與工程學系
;
National Chiao Tung University