方案摘要
方案下载| 应用领域 | 材料 |
| 检测样本 | 薄膜材料 |
| 检测项目 | |
| 参考标准 | ASTM 1461 闪光法测定热扩散系数标准试验方法 |
A well-established method for determining the thermal diffusivity of materials is the laser flash method. The work presented here compares two analysis methods for flash heating tests on anisotropic carbon bonded carbon fiber. This material exhibits a higher conductivity in the direction in which the fibers are oriented than in the direction perpendicular to the fiber orientation. Of the two analysis methods used, one method uses the temperature data from the entire surface of the sample by examining 201 temperature histories simultaneously, with each temperature history originating from an individual pixel within a line across the middle of the sample. The other analysis method uses only the temperature history from a single pixel in the center of the sample, similar to the data that is traditionally generated using the classical flash diffusivity method. Both analysis methods include accommodations for modeling the penetration of the laser flash into the porous surface of the carbon bonded carbon fiber material. The robustness of the method using the single-pixel temperature history shows that anisotropic thermal diffusivity can be measured using standard flash diffusivity instruments, if modeled properly, avoiding the additional complexity associated with the use of a thermal imaging camera.
文献贡献者
高海拔低气压模拟试验箱中高精度真空度程序控制解决方案
高温管式加热炉真空控制系统技术升级改造解决方案
宽变压环境质谱仪进样系统中的电动针阀精密压力控制解决方案
相关产品
关注
拨打电话
留言咨询
