The results revealed that thermo-treated alder wood, coated with various finishes, exhibited a strong variation of color compared to that of control specimens indicating of thermal modification was not very effective in restricting UV light induced degradation in the specimens.
Specific samples are selected as specimens of accelerated thermal aging tests and are tested at different temperatures.
The effects of possible damages in the specimens by cycles of thermal expansions and contractions, as well as the cycles of moisture movement and shrinkage are considered to reflect in the compressive strengths.
When the differential thermopower is studied on a standard-specimen thermocouple, where the specimen can be, in particular, a material, whose structural state is different from the standard only by its type or degree of treatment (specimen deformation or mode of specimen thermal treatment), the value of E T will reflect the changes caused by the treatment.
For these two types of specimens, thermal failure occurred when the temperature reached approximately 50 °C in the failure region.
However, depending on the dry density and water content of the specimen, the increasing rate of thermal conductivity becomes stable or even decreases with further increase of sand content.
An abnormal phenomenon was found that the stress rupture lives of specimens after thermal exposure at 900 °C were obviously lower than those at 1000 °C, which contained lower volume fraction of γ′ precipitates with coarsened and coalesced morphology.
A set of experiments on thin circular ceramic specimens yielded two-dimensional readings of thermal shock crack patterns with periodical and hierarchical characteristics.
A set of experiments on thin ceramic specimens yielded two-dimensional readings of thermal shock crack patterns with periodical and hierarchical characteristics that vary with the thermal shock temperature.
Furthermore, the existence of mechanical shock will affect the stress field in ceramic specimens, and then the evaluation of thermal shock resistance by critical rupture temperature difference as well as service performance of ceramics can be easily affected by mechanical shock.
