نتایج جستجو برای: crack free coating

تعداد نتایج: 572189  

2008
Y. Yamada J. C. Newman

Fatigue-crack-growth (FCG) rate tests were conducted on compact specimens made of an Inconel-718 alloy to study the behavior over a wide range in load ratios (0.1 6 R 6 0.95) and a constant Kmax test condition. Previous research had indicated that high R (>0.7) and constant Kmax test conditions near threshold conditions were suspected to be crack-closure-free and that any differences were attri...

2013
Helene Andersson Mats Stading Johan Hjärtstam Christian von Corswant Anette Larsson

Phase separated films with controlled porosity were made from ethyl cellulose (EC) and 30% w/w hydroxypropyl cellulose (HPC). The molecular weight of EC can be used to modify the mass transfer rate through coatings by effects on microstructure of the film. Processing conditions are, however, affected by the solution rheology, which could influence the film quality when using different molecular...

2012
Xiaoli Ji Weiwei Lou Qi Wang Jianfeng Ma Haihong Xu Qing Bai Chuantong Liu Jinsong Liu

In this paper, hydroxyapatite-carbon nanotube/titania (HA-CNT/TiO(2)) double layer coatings were successfully developed on titanium (Ti) substrates intended for biomedical applications. A TiO(2) coating was firstly developed by anodization to improve bonding between HA and Ti, and then the layer of HA and CNTs was coated on the surface by the sol-gel process to improve the biocompatibility and ...

2008
J. CHEN

The behavior of cleavage crack fronts at grain boundaries in free-standing silicon thin films is investigated through a microtensile experiment. In addition to the crystallographic orientation, the orientation of grain boundary plane also plays a critical role. With respect to the initial crack surface, if the inclination angle is relatively small, the crack tends to penetrate across the bounda...

2007
Ling-Sheng Jang Kuo-Ching Kuo

Lead Zirconate Titanate oxide (PZT) thick films with thicknesses of up to 10 μm were developed using a modified sol-gel technique. Usually, the film thickness is less than 1 μm by conventional sol-gel processing, while the electrical charge accumulation which reveals the direct effect of piezoelectricity is proportional to the film thickness and therefore restricted. Two approaches were adopted...

Journal: :Journal of the Society of Materials Science, Japan 1972

2014
David Moreau Arthur Villain David N Ku Laurent Corté

Insufficient bone anchoring is a major limitation of artificial substitutes for connective osteoarticular tissues. The use of coatings containing osseoconductive ceramic particles is one of the actively explored strategies to improve osseointegration and strengthen the bone-implant interface for general tissue engineering. Our hypothesis is that hydroxyapatite (HA) particles can be coated robus...

2015
Robert Sogomonian Hassan Alkhawam Viral Gandhi Feras Zaiem Emma A. Moradoghli Haftevani Terence McGarry

Recreational use of alkaloid free-base cocaine, also known as crack cocaine, has reached epidemic proportions in the United States. Inhalation of crack cocaine is known to cause a variety of pulmonary complications. Herein we present a case of diffuse alveolar hemorrhage (DAH) and particulate foreign matter deposition in the setting of crack cocaine inhalation.

2002
Y. Zhang B. A. Pint

In order to form model aluminide coatings for studying critical issues related to their high temperature oxidation and corrosion performance, a laboratory chemical vapor deposition (CVD) procedure is being used to more rigorously control the coating process in terms of composition, purity and microstructure. One ferritic (Fe-9Cr1Mo) and one austenitic alloy (304L) were selected as substrate mat...

2007
JENIFER S. WARNER Richard P. Gangloff

The objective of this study is to quantify and understand the effectiveness of a hexavalent chrome replacement ion to inhibit environmentally assisted fatigue crack propagation (EFCP) in high strength aluminum alloys. Because of dynamic-cyclic stress (or strain) loading, fatigue degradation occurs at stress levels considerably lower than the tensile or yield strength; degradation is exacerbated...

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