YOO, MK HIRAOKA, Y CHOI, J 2024-01-21T21:14:15Z 2024-01-21T21:14:15Z 2021-09-02 1995-01 0263-4368 https://pubs.kist.re.kr/handle/201004/145419 The recrystallization of Mo sheet doped with CaO and MgO under a H-2 atmosphere containing O-2 was investigated by means of optical, scanning-and transmission-electron microscopies. Also, in order to understand the chemical doping process, dried doping-reagent (Ca,Mg)(NO3)(2) was thermally decomposed and analyzed by DTA and TGA methods. X-ray diffraction scanning was used to identify the thermally decomposed products. During presintering at 1000 degrees C for 3.6 x 10(3) s, the doping reagent changed into CaO, MgO and Ca(OH)(2). Upon sintering the presintered compact at 2000 degrees C under a He (inert) atmosphere, MoO2 was formed by internal oxidation. However, under H-2 (reduction) atmospheres, the particles including Ca, Mg, Si and Al were observed. For the sheet, etch pits in a row (indicating low-angle boundaries) were observed along the primary grain boundaries within the coarsened grain at the beginning of the secondary recrystallization. Ln addition, the coarse particles containing Ca, Mg, Si and Al were also observed during the secondary recrystallization and the decrease of oxygen was not recognized. These results suggest that the coalescence of primary grains and the coarsening of dopant particles play an important role during the secondary recrystallization under a H-2 atmosphere. English ELSEVIER SCI LTD SINGLE-CRYSTAL TEMPERATURE SECONDARY RECRYSTALLIZATION OF MOLYBDENUM SHEET DOPED WITH CAO AND MGO UNDER HYDROGEN ATMOSPHERE Article 10.1016/0263-4368(95)94024-S 1 INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, v.13, no.4, pp.195 - 203 INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS 13 4 195 203 scie scopus A1995RF43400004 2-s2.0-58149324455 Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Materials Science Metallurgy & Metallurgical Engineering Article SINGLE-CRYSTAL TEMPERATURE Mo