Failure mechanisms of pure silver, pure aluminum and silver–aluminum alloy under high current stress

2006 ◽  
Vol 46 (12) ◽  
pp. 2096-2103 ◽  
Author(s):  
E. Misra ◽  
N.D. Theodore ◽  
J.W. Mayer ◽  
T.L. Alford
Keyword(s):  
Aluminum Alloy ◽  
Pure Aluminum ◽  
Failure Mechanisms ◽  
High Current ◽  
Pure Silver ◽  
Current Stress

Failure mechanisms of silver and aluminum on titanium nitride under high current stress

2005 ◽  
Vol 474 (1-2) ◽  
pp. 235-244 ◽  
Author(s):  
E. Misra ◽  
C. Marenco ◽  
N.D. Theodore ◽  
T.L. Alford
Keyword(s):  
Titanium Nitride ◽  
Failure Mechanisms ◽  
High Current ◽  
Current Stress

Techniques for Transmission Electron Microscopy of Fiber-Matrix Interfaces in Aluminum Alloy-Boron Composites by Ion Erosio

1971 ◽  
Vol 29 ◽  
pp. 204-205
Author(s):  
G. G. Shaw
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Aluminum Alloy ◽  
Electron Beam ◽  
Pure Aluminum ◽  
Ion Milling ◽  
Transmission Electron ◽  
Fiber Matrix ◽  
Ion Erosion ◽  
Row Of Fibers

The morphology and composition of the fiber-matrix interface can best be studied by transmission electron microscopy and electron diffraction. For some composites satisfactory samples can be prepared by electropolishing. For others such as aluminum alloy-boron composites ion erosion is necessary.When one wishes to examine a specimen with the electron beam perpendicular to the fiber, preparation is as follows: A 1/8 in. disk is cut from the sample with a cylindrical tool by spark machining. Thin slices, 5 mils thick, containing one row of fibers, are then, spark-machined from the disk. After spark machining, the slice is carefully polished with diamond paste until the row of fibers is exposed on each side, as shown in Figure 1.In the case where examination is desired with the electron beam parallel to the fiber, preparation is as follows: Experimental composites are usually 50 mils or less in thickness so an auxiliary holder is necessary during ion milling and for easy transfer to the electron microscope. This holder is pure aluminum sheet, 3 mils thick.

The Study on LED Accelerated Life Testes and Failure Mechanism

2013 ◽  
Vol 462-463 ◽  
pp. 678-682
Author(s):  
Yue Zong Zhang ◽  
Chun Xia Li ◽  
Wen Bin Zhang
Keyword(s):  
Active Region ◽  
Failure Mechanism ◽  
High Power ◽  
Light Emitting Diode ◽  
Characteristic Curve ◽  
Optical Parameter ◽  
Thermal Parameter ◽  
High Current ◽  
Current Stress ◽  
High Power Led

The paper is studied on the performances of low power light-emitting diode and high power LED under high-current. After observing and measuring the degeneration of them, the Analysis of the failure mechanism is given. The degenerations of the optical parameter, electronic parameter and thermal parameter of high power LED under 600mA current stress are measured and the failure mechanism is analyzed. The I-V characteristic curve proves that the degeneration is happened in active region. Under high-current stress, the active region of high power LED is ageing which leads to much more defects. The degenerations of pins on the resin package, metal wire and surface layer metal pads are found with scanning electron microscope.

Experimental Study of Ratcheting for SUS304 Stainless Steel and A1070 Aluminum Alloy

2007 ◽  
Author(s):  
Masao Sakane ◽  
Akihiko Inoue ◽  
Xu Chen ◽  
Kwang Soo Kim
Keyword(s):  
Experimental Study ◽  
Stainless Steel ◽  
Aluminum Alloy ◽  
Stress State ◽  
Austenitic Stainless Steel ◽  
Pure Aluminum ◽  
Stress Strain ◽  
Multiaxial Stress State ◽  
Ratcheting Strain ◽  
Additional Hardening

This paper studies the cyclic ratcheting for two materials under multiaxial stress state. The two materials are SUS304 austenitic stainless steel and A1070 pure aluminum. The former material is known as a material that gives strong additional hardening and the latter material shows little additional hardening under nonproportional cyclic loading. The ratcheting behavior under 12 stress-strain waveforms was extensively studied using hollow cylinder specimen. Ratcheting strain depended on the material and stress-strain waveform. Anisotropic ratcheting was found in A1070 but isotropic ratcheting was observed in SUS304 steel.

Thermal and Electrical Transport in Carbon Nanofiber Interconnects

2008 ◽  
Author(s):  
Tsutomu Saito ◽  
Hirohiko Kitsuki ◽  
Makoto Suzuki ◽  
Toshishige Yamada ◽  
Drazen Fabris ◽  
...  
Keyword(s):  
Heat Transport ◽  
Carbon Nanofibers ◽  
Joule Heating ◽  
Current Density ◽  
Electrical Transport ◽  
Heat Dissipation ◽  
Carbon Nanofiber ◽  
Transport Model ◽  
High Current ◽  
Current Stress

We study reliability of carbon nanofibers (CNFs) under high-current stress by examining CNF breakdown on four different configurations, suspended or supported, with/without tungsten deposition. The suspended results are consistently explained with a heat transport model taking into account Joule heating and heat dissipation along the CNF, while supported cases show a consistently larger current density just before breakdown, reflecting effective heat dissipation to the substrate.

Microstructure and surface of 2A12 aluminum alloy cladded with pure aluminum after solution treatment

Rare Metals ◽  
2020 ◽  
Author(s):  
Sen Du ◽  
Yong-An Zhang ◽  
Li-Zhen Yan ◽  
Xi-Wu Li ◽  
Zhi-Hui Li ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Pure Aluminum ◽  
Solution Treatment
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