Primary neuroendocrine tumor of the pineal gland is a rare disease. A 44-year-old woman with right cerebellopontine angle metastatic small cell neuroendocrine carcinoma underwent 18 F-FDG and 18 F-NOTATATE PET/ CT scans. 18 F-NOTATATE PET/CT showed intense uptake in the pineal gland lesions and multiple foci of intense focus of uptake in the intracranial leptomeningeal and whole spinal canal. However, the lesions are less impressive on 18 F-FDG PET/CT.

Congenerous and heterogeneous brazing of porous FeAl intermetallics has been successfully realised using Cu-10Sn green compact as brazing filler. Cu-Sn intermetallic phases combined with (Cu,Sn) solid solution were formed in the brazing line for congenerous brazing, while (Cu,Sn) solid solution was the main phase formed for heterogeneous brazing. Maximum tensile strengths for congenerous and heterogeneous brazing are 75?0 and 83?9 MPa which are about 81?5 and 91?2% of that of porous FeAl alloy (y92?0 Mpa) respectively. The interface structure of the stainless steel and porous FeAl joint brazed at 940uC for 15 min is S-Sz(Cu,Sn)/(Cu,Sn)/ Cu 9 Al 4 z(Cu,Fe)z(Cu,Sn)/AlFe 3 zAl 4 Cu 9 z(Cu,Sn). In the porous FeAl and porous FeAl joint brazed with Cu-10Sn filler at 940uC, Cu-Sn intermetallics and (Cu,Sn) solid solution were the main phases in the joint line.

UDC 621.762Porous Fe-25 wt.% Al alloy is synthesized by reactive synthesis with Fe and Al powders as the raw materials. Various processing parameters such as the final sintering temperature, pressure during cold pressing, and powder size are investigated to control the pore structure of the alloy. It has been shown that the optimal final sintering temperature is around 950-1050°C. When the pressure is higher than 110 MPa, the variation of the pore structure is mainly caused by the change of the pore nature in the as-pressed compact. In addition, the pore structure of porous Fe-25 wt.% Al alloys depends on the size of the raw powders and the weight fraction of different-sized raw powders.Кeywords: intermetallics, powder metallurgy, iron aluminides, porous material.

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