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The protective properties of organic coatings for internal applications of plane cabin are generally evaluated by means of accelerated degradation laboratory tests, including electrochemical techniques. The coatings are stressed by different mechanical, chemical, thermal loads and the effects on the protective properties can be measured by using well established electrochemical techniques, like electrochemical...
Blood pump has been as a kind of auxiliary device to be chosen for heart disease or congestive heart failure patients. This requires the device has good blood compatibility for long-term reliability. However, blood clotting and hemolysis are usually be found on flow path, the complex flow patterns within the hydrodynamic bearing clearance between the rotor and the stationary shaft have a dramatic...
Based on the traditional neutral salt fog test, a newly step-stress accelerated degradation test is designed which adds temperature as a step-stress condition. It is proved that the test process is accelerated obviously. The degradation data measured from insulation resistance of printed circuit board could be fitted into degradation curves. Using Arrhenius Equation to build temperature accelerating...
The influence of poling temperature (Tp) on d33 and of (Na0.52K0.4425Li0.0375)(Nb0.86Ta0.06Sb0.08)O3 ceramics is investigated. No notable stress is induced as there is not apparent phase transition on cooling when the ceramics are poled below orthorhombic‐tetragonal phase transition temperature (To–t). However, stress emerges by phase transition when poled above To–t leading to degrade d33. Consequently,...
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