The formation of Fe-N compounds by laser nitriding in an atmospheric ambient wasreported. By CW-CO2 laser irradiation on pure ferrite iron in the atmospheric am-bient, Fe-N compounds (including Fe2N, Fe3N and Fe4N) are formed as a result of alaser-enhanced and temperature-enhanced reactions. The samples were analyzed withX-ray diffraction. It is found that the laser power density, scanning speed and nitro-gen temperature are the main factors influencing the formation of Fe-N compounds.Nitrogen can be activated by pre-heating at some temperature. Nitrogen activationand sample surface melting by CW-CO2 laser greatly enhance the reaction betweenthe sample surface and nitrogen beam. After annealing at 500℃ for 3h, some Fe2Nand Fe3N converted into more stable Fe4N.
参考文献
| [1] | B Larish;U Brusky;H J Spies .[J].Surface and Coatings Technology,1999,116-119:205. |
| [2] | G Reisse;R Ebert .[J].Surface Science Applications,1996(106):268. |
| [3] | S Leigh;M Samandi;GA Collins;KT ShortP Martin and L Wielunski .[J].Surface and Coatings Technology,1996(85):37. |
| [4] | N. Renevier;P. Collignon;H. Michel;T. Czerwiec .Low temperature nitriding of AISI 316L stainless steel and titanium in a low pressure arc discharge[J].Surface & Coatings Technology,1999(2/3):128-133. |
| [5] | JD Wu;C Z Wu;XX Zhong;ZM Song and FM Li .[J].Surface and Coatings Technology,1997(96):330. |
| [6] | ED Anna;G Leggieri;A Luches;M Martino AV DrigoG MajniP Mengucci and IN Mihailescu .[J].Applied Surface Science,1990(46):365. |
| [7] | EW Kreutz;M Krosch;H Sung;A Voss .[J].Surface and Coatings Technology,1992(53):57. |
| [8] | I Ursu;I N Mihailescu;A M Prokhorov .[J].Journal of Physics D:Applied Physics,1985(18):2547. |
| [9] | JD Wu;L H Wu;ZM Song;LH Wu and FM Li .[J].Applied Surface Science,1995(90):81. |
| [10] | JD Wu;L H Wu;ZM Song;JZ Lii and CZ Wu .[J].Journal of Chin Laser,1994,A21:753. |
| [11] | W Moller;S Parascandola;O Kruse;R Giinzel and E Richter .[J].Surface and Coatings Technology,1999,116-119:1. |
| [12] | P Schaaf .[J].Hyperfine Interactions,1998(111):113. |
| [13] | W Moller;S Parascandola;T Telbizova;R G黱zel and E Richter .[J].Surface and Coatings Technology,2001,136:73. |
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