1. Protective Coatings against Liquid Metal Embrittlement Protective Coatings against Liquid Metal Embrittlement

2. Systems investigated: DLC NbN CeO 2 2

3. Sample Holder PVD System The Hollow Cathode Used in this experiment

4. Samples after Experiment 4 Only C 2 H 2 flux Acetylene and Argon Flux Delamination and Peeling Thickness and Color Gradient

5. NbN Coatings: 5 Lattice parameters slightly lower (4.385 Å) than standart one (4.410 Å) Deposition: I = 0.5 A Ar: 8 sccm N 2 : 5.1 sccm p base : 2E-5 mbar Room temperature Time: 30 min Deposition: I = 0.5 A Ar: 8 sccm N 2 : 5.1 sccm p base : 2E-5 mbar Room temperature Time: 30 min

6. 6 XRD Spectrum of Floating Temp NbN Coatings: 111 200 220 311 400

7. CeO 2 Coatings 7 Deposition: I = 0.5 A Ar: 8 sccm O 2 : 4 sccm p base : 2E-5 mbar Floating temperature Time: 120 min Deposition: I = 0.5 A Ar: 8 sccm O 2 : 4 sccm p base : 2E-5 mbar Floating temperature Time: 120 min Lattice Parameter: 5.442 Å (standart: 5.411 Å) Thickness: 1500 nm

8. 8 Resistive CeO 2 Coating Parameters: 1. Plasma Cleaning 2. Ar:O 2 =8:4 sccm 3. 240 ˚C 4. Thickness: 200 nm

9. Trasparenze di riserva 9

10. Liquid Metal Cooling Nuclear Reactors 10 Target Cooling for Accelerators

11. Equipment and Deposition Parameters: Magnetron Sputtering Coatings: NbN, CeO 2 Sample holders: - Watercooled -Biased -With IR heater Substrate: Al, quartz Gas: Ar, O 2, N 2 Parameters changed: -Substrate temperature -Bias of sample holder -Substrate plasma cleaning -Gas flow Magnetron Sputtering Coatings: NbN, CeO 2 Sample holders: - Watercooled -Biased -With IR heater Substrate: Al, quartz Gas: Ar, O 2, N 2 Parameters changed: -Substrate temperature -Bias of sample holder -Substrate plasma cleaning -Gas flow 11

12. NbN Coatings at T 25°C 12 N 2 flux: 5.0 ± 0.1 sccm