|Annealing temperature and property of Hf used for FWG-TWT|
|Ma; Tian-Jun; Chen; Zhen-Hai; Yu; Shi-Ji; Sun; Jian-Hai; Yi; Fu-Ting; Liu; Pu-Kun; Yi FT(伊福廷)
|发表期刊||TRANSACTIONS OF MATERIALS AND HEAT TREATMENT
|摘要||After fully considering working environment of electron gun grid cathode, Hf-grids were annealed at 800, 900, 1000 in vacuum. Microstructure and texture of the Hf-grids were studied by means of SEM, MRD and Schulz technology. In order to compare the property of Mo with Hf, Mo and Hf were respectively deposited onto the surface of the cathode by ion beam assisted deposition for imitating the surface conditions of Mo-grids and Hf-grids, the cathode was fabricated by Ba-W materials. The capability of restraining electron emission was evaluated by measuring the ratios of thermo-electronic emission and secondary electron emission coefficient on testing system. The results show that crystallinity and grain size increase and fiber structure decreases with increasing annealing temperature. The optimality temperature is 900. It is found that Hf can effectively restrain the electron emission. ©, 2015, Editorial Office of Transactions of Materials and Heat Treatment. All right reserved.|
Secondary electron emission coefficients
Secondary electron emissions
|WOS类目||537.1 Heat Treatment Processes
; 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals
; 701.1 Electricity: Basic Concepts and Phenomena
; 714.1 Electron Tubes
; 932.1 High Energy Physics
; 933 Solid State Physics
Ma,Tian-Jun,Chen,et al. Annealing temperature and property of Hf used for FWG-TWT[J]. TRANSACTIONS OF MATERIALS AND HEAT TREATMENT,2015,36:213-217.
Ma.,Tian-Jun.,Chen.,Zhen-Hai.,Yu.,...&伊福廷.(2015).Annealing temperature and property of Hf used for FWG-TWT.TRANSACTIONS OF MATERIALS AND HEAT TREATMENT,36,213-217.
Ma,et al."Annealing temperature and property of Hf used for FWG-TWT".TRANSACTIONS OF MATERIALS AND HEAT TREATMENT 36(2015):213-217.