摘要
为了改善钛金属的储氢和保持惰性气体的综合性能并增加其抗氢脆能力 ,使用合金化手段引入合金元素钒 ,用XRD仔细分析了所制取的不同钒含量的合金。通过对XRD结果的分析发现钒原子进入钛晶格后 ,当V <4 0 %时 ,合金晶胞参数a ,c的变化主要是V的原子半径起作用 ;V >4 0 %时 ,V的电子电荷和原子半径同时起着显著作用。这些因素使晶胞参数c先变小后变大 ,而a则一直减小 ,这导致晶格中A ,B层的间距增大 ,层间的相互作用被削弱 ,因而使c轴方向上的晶格畸变加大。随着V含量的增加 ,单胞体积呈下降趋势 ,但在V为 5 %～ 7 5 %之间有一平台区。 ( 0 0 2 )和 ( 10 3 )晶面半高宽的异常增大则是由于不同相结构衍射角相近 ,且相应衍射面晶格畸变加大等因素综合作用的结果。
When V%<4.0, the major factor is the vanadium atom radius which lead the transformation of a and c of crystal parameters after the vanadium entered the crystal lattice of titanium; when V%>4.0, the factors become the radius and electricity of the vanadium atom. So there are different change tides to the parameters a and c. The space between A and B side of arrange tightly of atoms along with the increase of V% in the alloys, the aberration is bigger in the c axis of crystal cell, and the volume of crystal cell takes on downtrend beside a flat area in the 5～7.5 of V%. There are several reasons to the unconventionally accretion of peak width at half height of (002) and (103) crystal face, which are the close diffraction angles between the different crystal structures, the aberration of c axis, and the reconstruction of the slim area atoms.
出处
《钛工业进展》
CAS
2004年第3期20-23,共4页
Titanium Industry Progress
基金
中国工程物理研究院 2所基金资助
