4.2. Wick structure manufacture

Figure 9. Grain size 10 μm, sintering temperature 600C, sintering time 30 min.

154 Porosity - Process, Technologies and Applications

Figure 10. Grain size 25 μm, sintering temperature 600C, sintering time 30 min.

Figure 11. Grain size 10 μm, sintering temperature 600C, sintering time 90 min.

From the results, porosity measurement and microscopic analysis were chosen for wick structure of LHP two copper etalons and two nickel etalons. The first structure was made of copper grain size 50 μm and sintered at temperature 950C for 30 min (Figure 13). Second structure was made of copper grain size 100 μm and sintered at temperature 950C for 30 min. Third structure was made of nickel grain size 10 μm and sintered at temperature 600C for 90 min (Figure 14). The fourth structure was made of nickel grain size 25 μm and sintered at temperature 600C for 90 min. The wick structures were sintered in send form (mold) and manufactured according to model of required shape in muffle furnace.
