The objective of this work is the production and characterization of glass-ceramic with recycled glass powder and 4% (w/w) of cerium dioxide. Eleven groups were defined with conformation pressure of 11.6 and 25.8 MPa, and cerium dioxide addition. The sintering temperatures of 650, 675, 700 and 750 °C were used. The raw material was formed into a mold with a uniaxial pressure. The density was measured by the Archimedes principle. The water absorption of the groups was also determined, as linear contraction percentage and the crystalline structure. The flexural strength was obtained by the three-point bending test and the results analyzed by the Weibull analysis. The specimens presented density ranging from 1.99 to 2.38 g/cm3. Increasing the temperature provided an increase in the density of the specimens and the flexural strength. At higher sintering temperature, this behavior was not observed. The highest flexural strength was 63.55 MPa, obtained at the sintering temperature of 700 ºC, conformed with 25.8 MPa, only glass powder. The increase in the forming pressure favored crystallization. The addition of cerium dioxide favored for the increase density and the Weibull modulus, but decrease of the flexural strength.

Metal structures can be repaired with composites using adhesives. However, because it involves polymeric materials, the environmental conditions of the structure can modify the behavior of the material, making its use unfeasible. Ultraviolet radiation (UV) is a degradation agent that has strong action on the polymeric materials, which are present in the adhesives and matrix of composites. In this work, it is studied the behavior of steel/GFRP single-lap joints using epoxy adhesive when exposed to UV radiation for different time intervals, to understand their behavior. The joint behavior was evaluated by shear testing and the adhesive was analyzed by DMA, FTIR and TGA. A decline of up to 32.5% in shear strength was observed with increasing UV exposure time. The Tg of the adhesive also showed a reduction. The FTIR spectra of the adhesive indicated a reduction in peaks related to epoxy functional groups when the exposure time was increased. This revealed degradation of the polymeric chains of the adhesive, a fact that can be associated with the reduction in Tg and the reduction in the shear strength of the joint. Thus, the application of such material in places exposed to UV radiation should consider the poorer performance regarding degradation.