金刚石及其复合材料的导热性能评价 (Evaluation of the Thermal Conductivity of Diamond and Diamond Composites)

铜基复合材料的初衷是在金属（铜）基体中混合高导热颗粒，例如金刚石等，期待“强强联合”，以获得更高的导热性能并兼顾成本、加工特性等。铜基复合材料的关键性能就是导热。本报告介绍通过闪射法测量铜-金刚石复合材料热扩散系数的相关案例，展示方法原理以及制造工艺对材料导热性能的影响。

Copper matrix composites were originally designed by incorporating particles with a high Thermal ConductivityThermal conductivity (λ with the unit W/(m•K)) describes the transport of energy – in the form of heat – through a body of mass as the result of a temperature gradient (see fig. 1). According to the second law of thermodynamics, heat always flows in the direction of the lower temperature.thermal conductivity, such as diamond, into a copper matrix. This "synergistic combination" of two superior components is expected to deliver enhanced Thermal ConductivityThermal conductivity (λ with the unit W/(m•K)) describes the transport of energy – in the form of heat – through a body of mass as the result of a temperature gradient (see fig. 1). According to the second law of thermodynamics, heat always flows in the direction of the lower temperature.thermal conductivity while balancing cost, machinability, and other comprehensive properties. Thermal conductivity is the core performance indicator of copper matrix composites. This report presents case studies on measuring the Thermal DiffusivityThermal diffusivity (a with the unit mm2/s) is a material-specific property for characterizing unsteady heat conduction. This value describes how quickly a material reacts to a change in temperature.thermal diffusivity of copper-diamond composites using the laser flash method. It also elaborates on the fundamental principles of this technique and the influence of fabrication processes on the Thermal ConductivityThermal conductivity (λ with the unit W/(m•K)) describes the transport of energy – in the form of heat – through a body of mass as the result of a temperature gradient (see fig. 1). According to the second law of thermodynamics, heat always flows in the direction of the lower temperature.thermal conductivity of materials.

Speaker:
Ms. Jinyan Li
Application Lab Manager
NETZSCH Scientific Instruments (Shanghai) Ltd.
NETZSCH Analyzing & Testing