研究目的
Investigating the behaviour and transmission of the zero-phonon line of silicon vacancy centres in doped multilayer diamond coatings for wear protection indication.
研究成果
The study demonstrates that silicon doped multilayer diamond coatings can conceptually serve as an indicator for the condition of the coating through photoluminescence measurements. The undoped diamond layers show high transmissivity to the zero-phonon line, suggesting potential for wear protection applications.
研究不足
The study is limited by the technical constraints of the LaPlas CVD process and the optical properties of the diamond coatings, which may affect the reproducibility and applicability of the photoluminescence measurements for wear indication.
1：Experimental Design and Method Selection:
The study utilized an atmospheric laser-based plasma chemical vapour deposition (LaPlas CVD) for synthesizing silicon doped multilayer diamond coatings. Photoluminescence measurements were performed with an excitation area of 18 mm2 and a wavelength of 248 nm.
2：Sample Selection and Data Sources:
Tungsten carbide (WC) samples were coated with silicon doped and undoped polycrystalline diamond layers. The silicon concentrations were investigated using wavelength-dispersive X-ray spectroscopy (WDX).
3：List of Experimental Equipment and Materials:
Equipment included a LaPlas CVD-setup, Raman spectrometer (Renishaw RM 1000), excimer laser, TEC spectrometer (StellarNet SILVER-Nova), and scanning electron microscope (SEM) (Carl Zeiss EVO MA-10). Materials included silicon carbide evaporation rods and process gases methane and hydrogen.
4：0). Materials included silicon carbide evaporation rods and process gases methane and hydrogen.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The depositions were performed on WC at a process temperature of 1050 °C. Photoluminescence and Raman measurements were conducted to examine the coatings' properties.
5：Data Analysis Methods:
The intensity of the SiV zero-phonon line was analyzed to determine the coatings' condition and wear indication potential.
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