Visualization and quantitative analysis of interfacial thermal barrier by a thermal microscope

激光的点或面照射是用来加热样品和检测样品温度的。这种方法适用于研究试样热性能的局部变化。在本研究中，采用线聚焦激光束对试样进行加热，以抑制热波的消光并限制传播方向。这使我们不仅可以更精确地测量热扩散率，还可以测量热性质的各向异性。目前，晶界热阻还不能定量测量，但测量技术正在积累。

A point or areal irradiation of a laser light is equipped to heat a specimen and to detect a specimen temperature. This method is suitable for investigating a local variation of thermal properties of the specimen. In the present study, a line focused laser beam is equipped for heating a specimen to suppress an extinction of heat wave and to restrict a direction of propagation. This allows us to measure not only the thermal diffusivity more preciously but also the anisotropy of the thermal properties. At present, the thermal resistance of the grain boundary is not able to measure quantitatively, however, know-hows of the measurement is accumulating.