Oxidation behavior of Mo5SiB2-based alloy at elevated temperatures

Yoshimi, Kyosuke; Nakatani, Shinya; Suda, Takahiro; Hanada, Shuji; Habazaki, H.

doi:10.1016/s0966-9795(02)00013-4

Cited by 111 publications

(70 citation statements)

References 28 publications

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“…Especially, Mo-Si-B alloys have high potential as heat-resistant materials at ultra-high temperature [1][2][3][4][5]. However, the synthesis of these materials is usually difficult because of their extremely high melting temperatures.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Mo–Si–B in situ composites by mechanical alloying

Yamauchi

Yoshimi

Kurokawa

et al. 2007

Journal of Alloys and Compounds

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In this study, the synthesis of Mo-Si-B multi-phase alloys, so-called in-situ composites, was attempted with the combination of mechanical alloying (MA) and spark plasma sintering (SPS) processes. MA was conducted with mixed powders of Mo, Si and B using a planetary ball mill under various milling conditions. MAed powders were characterized by X-ray diffractometry (XRD) and scanning electron microscopy (SEM). The results obtained by XRD indicated that Mo-Si-B alloyed powders were successfully produced when elemental powders were milled at a higher milling energy.Vacuum heat treatments after the MA process promoted the formation of Mo-Si-B intermetallic phase in MAed powders. On the other hand, the MAed powders were successfully consolidated by a SPS technique, and as a result, sound compacts of Mo 5 SiB 2 -based composites were synthesized. keywords：molybdenum silicides; mechanical alloying; spark plasma sintering; X-ray diffraction

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Section: Introductionmentioning

confidence: 99%

Synthesis of Mo–Si–B in situ composites by mechanical alloying

Yamauchi

Yoshimi

Kurokawa

et al. 2007

Journal of Alloys and Compounds

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“…В работах [5][6][7] изучены свойства сплавов в тройной системе Mo-Si-B при варьиро вании концентраций в интервалах 9-12 ат.% Si и 8-20 ат.% B. Данные материалы помимо высоко температурной прочности и стойкости к окисле нию обладают высокой вязкостью разрушения. Значительная часть работ посвящена исследова нию сплавов на основе Т 2 фазы (Mo 5 SiB 2 ) [8][9][10][11][12][13], которая обладает высоким потенциалом в обла сти ультравысокотемпературных применений. Т 2 фаза формируется по псевдодвойной перитек тической реакции при температуре ниже 2130 °С и имеет довольно широкую область гомогенности около стехиометрического состава (рис.…”

Section: № 4 2013unclassified

“…1). Для получения различных сплавов на основе силици дов молибдена и бора, включая Т 2 фазу, традици онно используется технология электродугового переплава в атмосфере аргона [8][9][10][11][12][13]. Эта техно логия многостадийна, требует длительной изо термической выдержки при температурах свыше 1600 °С и является очень чувствительной к не большим отклонениям технологических режимов, приводящим к изменению фазового состава [8].…”

Section: № 4 2013unclassified

“…Основной структурной составляющей керами ки состава 3 являются крупные зерна Т 2 фазы со средним размером [10][11][12][13][14][15][16][17][18][19][20] Образцы состава 3 на основе Т 2 фазы облада ют высокой удельной плотностью (ρ гидр ) и твер достью (HV).…”

Section: результаты исследований и их обсуждениеunclassified

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Combustion features in the Mo–Si–B system. Part 1. Mechanism and kinetics

Левашов¹,

Погожев²,

Потанин³

et al. 2015

Izv. vuzov, Porošk. metall. funkc. pokryt.

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“…Among them, Mo-Si-B alloys have attracted a considerable amount of attention quite recently. In particular Mo 5 SiB 2 (T 2 ), the only ternary compound in the Mo-Si-B system, has excellent ultra high temperature yield and creep strengths, 11) good oxidation resistance 12) and relatively low density comparable to Ni-base superalloys. 13) However, the drawback of the phase is its poor fracture toughness, comparable to that of ceramics.…”

Section: Introductionmentioning

confidence: 99%

Phase Formation and Solidification Routes Near Mo-Mo<SUB>5</SUB>SiB<SUB>2</SUB> Eutectic Point in Mo-Si-B System

Yoshimi

Maruyama

et al. 2010

Mater. Trans.

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The phase formation behavior during solidification in the Mo-Si-B system was experimentally examined around the triple junction point (T) of the Mo solid solution (Mo ss ), Mo 5 SiB 2 (T 2 ) and Mo 2 B primary phases in the Mo-Si-B liquidus projection suggested by Yang and Chang through thermodynamic calculations, and the solidification routes of the Mo-Si-B alloys were reconsidered based on the obtained results. Alloys of four different compositions around the T point were produced by arc-melting. The primary phases observed in these alloys were in excellent agreement with the liquidus projection proposed by Yang and Chang. The solidification routes were basically Mo ss (primary) ! Mo ss + Mo 2 B ! Mo ss + T 2 eutectic ! Mo ss + T 2 + Mo 3 Si (A15), T 2 (primary) ! Mo ss + T 2 eutectic ! Mo ss + T 2 + A15, or Mo 2 B (primary) ! Mo ss + T 2 eutectic ! Mo ss + T 2 + A15, depending on the composition. However, a quantitative EPMA analysis indicated the compositions of the Mo ss -T 2 eutectic and Mo ss + T 2 + A15 phases differed from the reported liquidus projection. This is due to the difficulties interpreting the unusual solidification routes in the Mo-Si-B system and their as-cast microstructures.

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Oxidation behavior of Mo5SiB2-based alloy at elevated temperatures

Cited by 111 publications

References 28 publications

Synthesis of Mo–Si–B in situ composites by mechanical alloying

Synthesis of Mo–Si–B in situ composites by mechanical alloying

Combustion features in the Mo–Si–B system. Part 1. Mechanism and kinetics

Phase Formation and Solidification Routes Near Mo-Mo<SUB>5</SUB>SiB<SUB>2</SUB> Eutectic Point in Mo-Si-B System

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