The room temperature stability and crystallization of amorphous Nd_xFe_(1-x)thin films with x=0.06—0.90,prepared by flash evaporation at 77 K,were investigated by X-ray diffraction and TEM observation.The amorphous N...The room temperature stability and crystallization of amorphous Nd_xFe_(1-x)thin films with x=0.06—0.90,prepared by flash evaporation at 77 K,were investigated by X-ray diffraction and TEM observation.The amorphous Nd_xFe_(1-x)films are stable at room temperature when 0.19<x<0.50.Crystallized phases grow along the surface of film as very thin flakes and become thick only at relatively high temperatures.After complete crystallization,the Nd_xFe_(1-x)films with x<0.50 are composed of Nd_2Fe-(17)and metal Nd,but no NdFe2,a phase expected to occur by phase diagram.展开更多
Many experimental results have demonstrated that the nanocrystalline Fe-Mo-Si-B alloys prepared by crystallization of amorphous (Fe<sub>o.99</sub>,Mo<sub>o.o1</sub><sub>78</sub>Si&l...Many experimental results have demonstrated that the nanocrystalline Fe-Mo-Si-B alloys prepared by crystallization of amorphous (Fe<sub>o.99</sub>,Mo<sub>o.o1</sub><sub>78</sub>Si<sub>9</sub>B<sub>13</sub> （FMSB） alloy have many novel physical properties, except some brittleness. In order to solve this problem, the nanocrystalline alloy and a metal aluminum were bound together by isothermally annealing alternate layers consisting, of Al and amorphous FMSB alloy ribbons under high pressure in the present work to make an Al/Fe-Mo-Si-B alloy nanostructured composite. Different展开更多
文摘The room temperature stability and crystallization of amorphous Nd_xFe_(1-x)thin films with x=0.06—0.90,prepared by flash evaporation at 77 K,were investigated by X-ray diffraction and TEM observation.The amorphous Nd_xFe_(1-x)films are stable at room temperature when 0.19<x<0.50.Crystallized phases grow along the surface of film as very thin flakes and become thick only at relatively high temperatures.After complete crystallization,the Nd_xFe_(1-x)films with x<0.50 are composed of Nd_2Fe-(17)and metal Nd,but no NdFe2,a phase expected to occur by phase diagram.
基金the National Natural Science Foundation of China.
文摘Many experimental results have demonstrated that the nanocrystalline Fe-Mo-Si-B alloys prepared by crystallization of amorphous (Fe<sub>o.99</sub>,Mo<sub>o.o1</sub><sub>78</sub>Si<sub>9</sub>B<sub>13</sub> （FMSB） alloy have many novel physical properties, except some brittleness. In order to solve this problem, the nanocrystalline alloy and a metal aluminum were bound together by isothermally annealing alternate layers consisting, of Al and amorphous FMSB alloy ribbons under high pressure in the present work to make an Al/Fe-Mo-Si-B alloy nanostructured composite. Different
