A novel in situ fracture stage has been used to conduct micro compact tension (micro-CT) tests within the preparation chamber of a time-of-flight secondary-ion mass spectrometry (ToF-SIMS) instrument. Tests have been undertaken in the usual ultra high vacuum (UHV) conditions and in an ambient air atmosphere for comparison. A plain polyester resin system has been compared to an organically modif...

The purpose of this in vitro study was to compare the load-bearing capacity of posterior three-unit fixed dental prostheses (FDP) produced with three different all-ceramic framework materials: glass-infiltrated alumina (ICA), glass-infiltrated alumina strengthened with zirconia (ICZ), and yttria-stabilized polycrystalline zirconia (YZ). Additionally, the influence on aging of mechanical cyclic ...

The effect of temperature on the lap shear strength (LSS) and failure mechanisms ultrasonically welded carbon fibre reinforced polyphenylene sulphide (CF/PPS) joints was investigated, correlating weld performance to crystallinity degree PPS at weldline. single-lap tests were carried out temperatures ranging from –50 °C 120 three series, one with amorphous two semi-crystalline overall trend decr...

Anodizing process is largely performed on aluminum alloys to enhance corrosion and wear resistances. However, this can significantly reduce the fatigue resistance of depending alloy parameters. This paper deals with influence anodizing aeronautical 2618-T851. The anodic film has been characterized after each step using scanning electron microscopy (SEM). analysis showed that layer was crazed ju...

A rapid fracture test in four-point bending is proposed to assess hydrogen embrittlement (HE) susceptibility of high strength martensitic steels. The novelty this technique the rate loading, whereas conventional approaches require prolonged slow strain testing. essential fractographic features required identify mechanisms HE failure remain evident, despite fast loading conditions. To demonstrat...

INTRODUCTION The use of reciprocating movement was claimed to increase the resistance of nickel-titanium (NiTi) file to fatigue in comparison with continuous rotation. Recently 2 new brands of NiTi files have been marketed for use in a RM mode. The purpose of this study was to compare the cyclic fatigue resistance and torsional resistance of these 2 files, Reciproc and WaveOne. METHODS Cyclic...