Processing and Environmental Effects on Composite Repairs

Effects of different surface treatments on ceramic repairs with composite.

OBJECTIVE To compare different surface treatments of lithium disilicate-based ceramic on bond strengths to composite. METHODS Lithium disilicate-based ceramic microbars (1 mm × 1 mm × 6 mm) were produced and abraded using diamond (D) or CoJet sandblasting (C), etched using phosphoric acid (P) or hydrofluoric acid (H) and silanised (S). A total of 12 surface treatments were adopted: D, DP, DH,...

environmental effects of gol-e-gohar iron ore mine on groundwater of the area

gol-e-gohar iron ore mine of sirjan in southern part of iran is a large open pit that operates below the groundwater table and during mining operation, dewatering is required to prevent operation processes from flooding. current operation is going on by digging wells in or out of the pit and pumping to prevent flooding. as a result of the former dewatering operation a vast deep cone of depressi...

One-year aging effects on microtensile bond strengths of composite and repairs with different surface treatments.

The present study aimed to evaluate effects of different surface treatments and aging of composite cylinders on bond strength of composite resin repair. Thirty-two composite cylinders were produced and divided into four groups according to type of surface treatment and storage time of composite cylinder and repair. Cylinder surface of control group (Gcontrol) received no treatment before compos...

Thermal Ndt & E of Composite Aircraft Repairs

The objective of this study was to investigate different defects and material systems (notch or delamination under carbon and boron composite patching bonded with FM73 adhesive film to the surface of Al 2024-T3) using several thermal non-destructive testing and evaluation techniques. Active thermographic approaches, using, firstly, a simple heat excitation source with an infrared camera, second...

^paceJTime Processing, Environmental-Acoustic Effects