The microstructure of as-cast Zr60Al15Ni25 bulk metallic glass was investigated by high-resolution transmission electron microscopy. It is found that there exist numerous short-range order regions （SRORs） in the met...The microstructure of as-cast Zr60Al15Ni25 bulk metallic glass was investigated by high-resolution transmission electron microscopy. It is found that there exist numerous short-range order regions （SRORs） in the metallic glass though it is identified to be amorphous by X-ray diffraction method. Furthermore, the amorphous degree shows a close correlation with the microstructure of corresponding mother ingot. The crystallization kinetics was investigated by differential scanning calorimetry under isochronal and isothermal conditions. The results show that the crystallization is triggered by the growth of the pre-existing SRORs and the growth is three-dimension diffusion-controlled. The amorphous degree of Zr60Al15Ni25 bulk metallic glass considerably influences its crystallization kinetics, namely, the more homogeneous distribution of atoms results in a more sluggish nucleation behavior.展开更多
Lymphomas are known as neoplasm’s caused by clone proliferation of B and T lymphocytes. Extranodal lymphoma arises from tissues other than lymph nodes or even from sites which normally doesn’t contain lymph tissues....Lymphomas are known as neoplasm’s caused by clone proliferation of B and T lymphocytes. Extranodal lymphoma arises from tissues other than lymph nodes or even from sites which normally doesn’t contain lymph tissues. Orbital adnexal lymphoma arises from eyelid, orbit, lacrimal glands or conjunctivae and it is totally different from intraocular lymphoma. Wide range of differential diagnosis including infectious inflammatory orbital disease, preseptal and orbital cellulitis, orbital idiopathic inflammatory disease-pseudotumors, especially dacryoadenitis and myositis and thyroid associate orbit disease makes the diagnosis of orbital adnexal lymphoma even more difficult. We represent the case of diagnostic delay of very aggressive form orbital non-Hodgkin lymphoma occurred because of the unspecific signs and symptoms as well as not indicative imaging investigation and laboratory tests.展开更多
基金Project (50804032) supported by the National Natural Science Foundation of ChinaProject (2008011046) supported by the Natural Science Foundation of Shanxi Province, ChinaProject (20080321036) supported by the Key Technologies R & D Program of Shanxi Province, China
文摘The microstructure of as-cast Zr60Al15Ni25 bulk metallic glass was investigated by high-resolution transmission electron microscopy. It is found that there exist numerous short-range order regions （SRORs） in the metallic glass though it is identified to be amorphous by X-ray diffraction method. Furthermore, the amorphous degree shows a close correlation with the microstructure of corresponding mother ingot. The crystallization kinetics was investigated by differential scanning calorimetry under isochronal and isothermal conditions. The results show that the crystallization is triggered by the growth of the pre-existing SRORs and the growth is three-dimension diffusion-controlled. The amorphous degree of Zr60Al15Ni25 bulk metallic glass considerably influences its crystallization kinetics, namely, the more homogeneous distribution of atoms results in a more sluggish nucleation behavior.
文摘Lymphomas are known as neoplasm’s caused by clone proliferation of B and T lymphocytes. Extranodal lymphoma arises from tissues other than lymph nodes or even from sites which normally doesn’t contain lymph tissues. Orbital adnexal lymphoma arises from eyelid, orbit, lacrimal glands or conjunctivae and it is totally different from intraocular lymphoma. Wide range of differential diagnosis including infectious inflammatory orbital disease, preseptal and orbital cellulitis, orbital idiopathic inflammatory disease-pseudotumors, especially dacryoadenitis and myositis and thyroid associate orbit disease makes the diagnosis of orbital adnexal lymphoma even more difficult. We represent the case of diagnostic delay of very aggressive form orbital non-Hodgkin lymphoma occurred because of the unspecific signs and symptoms as well as not indicative imaging investigation and laboratory tests.
