Experimental investigation of heat dissipation for diamondlike carbon coating on AISI 304 stainless steel

In this paper, by using the Acetylene as the reaction gas, the plasma enhanced chemical vapor deposition is used to coat the diamond-like carbon film on AISI 304 stainless steel thin-plate of cell phone for performing the relative heat dissipation experiments. Different thicknesses of the diamond-like carbon film are considered to be: 1, 2 and 2.5 μm, respectively. The experiments include: (a) heat dissipation test for fixed temperature from uniform heat source, (b) heat dissipation test for temperature raise from point-heat source and (c) heat dissipation test for fixed temperature from point-heat resource. The infrared ray camera and thermal analysis system (TAS) are used to measure and record the change of temperature. It can be seen from experimental result that the heat dissipation can raise for AISI 304 stainless steel thin-plate coated by the diamond-like carbon film when compared with coated by the traditional silver or black paint. Thicker coated film leads to higher heat dissipation rate. Finally, by using the method of curve fitting, the finite element ANSYS analysis is compared with the experimental result. The coefficient of thermal diffusivity can be determined.