Xinqing ZHAO
,
Yong LIANG
,
Keshen XIAO
,
Feng ZHENG and Zhuangqi HU (State Key Lab. of RSA
,
Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
110015
,
China)(To whom correspondence should be addressed)
材料科学技术（英）
γ-Fe nano-particles with size of 20-40 nm were produced by SF6-sensitized CW CO2 laser-induced gaseous pyrolysis of Fe(Co) 5, The γ-Fe stabte in reaction zone at above 910℃ was formed.The rapid quenching prevents from the γ-Fe transforming to α-Fe as rapidly cooling from high temperature to room temperature, The characteristics of the particles were examined at room temperature by TEM. electron diffraction and XRD. It was proved that about 70% of γ-Fe phase in the particles was present. In addition. the lattice constant of the γ-Fe was 0.364 nm in place of 0.360 nm
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