Cubic C3N4 compound in the C-N thin films on Si and NaCl substrates was prepared by ion beam sputtering of a pure graphite target with discharge gas of pure N2. X-ray photoelectron spectroscopy indicated that nitrogen...Cubic C3N4 compound in the C-N thin films on Si and NaCl substrates was prepared by ion beam sputtering of a pure graphite target with discharge gas of pure N2. X-ray photoelectron spectroscopy indicated that nitrogen atoms combined with sp2- and sp3- coordinated C atoms in the film, respectively. X-ray diffraction, selected area electron diffraction and high-resolution electron microscopy were used to identify the cubic C3N4 phase. The results reconfirm the ab initio calculations on metastable structure in C-N compounds展开更多
By combination of DC reactive magnetron sputter i ng with multiple arcplating, the alternating C 3 N 4 /TiN compo und film is deposited onto HSS. The core level binding energy and the contents o f carbon and n...By combination of DC reactive magnetron sputter i ng with multiple arcplating, the alternating C 3 N 4 /TiN compo und film is deposited onto HSS. The core level binding energy and the contents o f carbon and nitrogen are characterized by X\|ray photoelectron spectrum. X\|ray diffraction(XRD) shows that compound thin film contains hard crystalline phases of α \|C 3 N 4 and β \|C 3 N 4 . The Knoop microhardne ss in the load range of 50.5\|54.1 GPa is measured. According to acoustic emissi on scratch test, the critical load values for the coatings on HSS substrates are in the range of 40\|80 N. The metal coated with C 3 N 4 /TiN compound f ilms has a great improvement in the resistance against corrosion. Many tests sho w that such a coating has a very high wearability. Compared with the uncoated an d TiN coated tools, the C 3 N 4 /TiN coated tools have a much longer cut ting life.展开更多
The C 3N 4 film on Al 2O 3 formed by dynamic catalytic at low energy Ar + ion sputtering C 3H 6N 6+Ni target. The ratio of nitroge atoms to carbon in the films is 4∶3. C(1 s ) peakes for graphite, diamond and C≡N no...The C 3N 4 film on Al 2O 3 formed by dynamic catalytic at low energy Ar + ion sputtering C 3H 6N 6+Ni target. The ratio of nitroge atoms to carbon in the films is 4∶3. C(1 s ) peakes for graphite, diamond and C≡N not have observed. above results are obtained by XPS. The main peak appears at 1275cm -1 in the Raman spectrum. Results of SEM cant observed that sample is consist of cluter type crystal, but is no needle type. The colour is yellow but is no white. The experimental result indicated films consist of inorganic cavalent solid carbon nitride. The results from XRF observed sample contain Fe and Ni elements. It has been illustrated that Fe and Ni responsible for one C 3N 4 polymerization.展开更多
文摘Cubic C3N4 compound in the C-N thin films on Si and NaCl substrates was prepared by ion beam sputtering of a pure graphite target with discharge gas of pure N2. X-ray photoelectron spectroscopy indicated that nitrogen atoms combined with sp2- and sp3- coordinated C atoms in the film, respectively. X-ray diffraction, selected area electron diffraction and high-resolution electron microscopy were used to identify the cubic C3N4 phase. The results reconfirm the ab initio calculations on metastable structure in C-N compounds
文摘By combination of DC reactive magnetron sputter i ng with multiple arcplating, the alternating C 3 N 4 /TiN compo und film is deposited onto HSS. The core level binding energy and the contents o f carbon and nitrogen are characterized by X\|ray photoelectron spectrum. X\|ray diffraction(XRD) shows that compound thin film contains hard crystalline phases of α \|C 3 N 4 and β \|C 3 N 4 . The Knoop microhardne ss in the load range of 50.5\|54.1 GPa is measured. According to acoustic emissi on scratch test, the critical load values for the coatings on HSS substrates are in the range of 40\|80 N. The metal coated with C 3 N 4 /TiN compound f ilms has a great improvement in the resistance against corrosion. Many tests sho w that such a coating has a very high wearability. Compared with the uncoated an d TiN coated tools, the C 3 N 4 /TiN coated tools have a much longer cut ting life.
文摘The C 3N 4 film on Al 2O 3 formed by dynamic catalytic at low energy Ar + ion sputtering C 3H 6N 6+Ni target. The ratio of nitroge atoms to carbon in the films is 4∶3. C(1 s ) peakes for graphite, diamond and C≡N not have observed. above results are obtained by XPS. The main peak appears at 1275cm -1 in the Raman spectrum. Results of SEM cant observed that sample is consist of cluter type crystal, but is no needle type. The colour is yellow but is no white. The experimental result indicated films consist of inorganic cavalent solid carbon nitride. The results from XRF observed sample contain Fe and Ni elements. It has been illustrated that Fe and Ni responsible for one C 3N 4 polymerization.
