摘要
用径迹显微照相技术（ＰＴＡ）测定和研究了９００－１２００℃范围内面心立方０４ＭｎＮｂＢ，２５ＭｎＴｉＢ，Ｆｅ－３０％Ｎｉ－Ｂ和Ｎｉ－Ｂ合金以及体心立方Ｆｅ－３％Ｓｉ－Ｂ合金中硼的扩散系数，得到了相应的扩散常数Ｄ＿０和扩散激活能Ｑ的值．实验表明：实际合金中硼的扩散速度与早期文献报道有较大差距，在体心立方结构的Ｆｅ－３％Ｓｉ－Ｂ合金中硼的扩散速度比面心立方结构的钢中快很多。
Abstract By means of particle tracking autoradiography (PTA), the diffusion coefficients of B between 900-1200℃ were measured in 04MnNbB steel, 25Mn TiB steel,Ni-B, Fe30% Ni-B and Fe-3% Si-B alloys, and the frequency factor D0 and activation energy Q were obtained respectively. The experimental results indicate that there was an obvious difference between the present result and that obtained by Busby (in 1953). It was found that the B diffusivity in γ-Fe increased as Ni added. The diffusivrty of B in Fe-3% Si-B alloy with bcc structure was much slower than one obtained by Busby in α-Fe(1954), however which was much rapid than the results obtained in γ-Fe(with fcc structure) eywords Fe-alloy. Ni-alloy, B, diffusion coefficient. grain boundary segregation
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1995年第2期A056-A063,共8页
Acta Metallurgica Sinica
基金
国家自然科学基金
冶金工业部科技司资助
