Heat Removal from Bipolar Transistor by Loop Heat Pipe with Nickel and Copper Porous Structures
Figure 3
Microscopic pictures of the sintered structures from nickel powders. (a) Grain size of 10 μm, sintering temperature of 600°C, and sintering time of 30 min. (b) Grain size of 25 μm, sintering temperature of 600°C, and sintering time of 30 min. (c) Grain size of 10 μm, sintering temperature of 600°C, and sintering time of 90 min. (d) Grain size of 25 μm, sintering temperature of 600°C, and sintering time of 90 min.
