Oxidation behavior of extruded Mo5Si3Bx–MoSi2–MoB intermetallics from 600°–1600 °C

Thom, Andrew J.; Summers, Eric; Akinç, Müfit

doi:10.1016/s0966-9795(02)00034-1

Cited by 50 publications

(42 citation statements)

References 24 publications

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“…Boron evaporation is known to occur during extended exposures at 1150°C [3], and boron was not detected by EDS in the surface scales of samples oxidized at 1100°C in the present study. However, EDS is relatively insensitive to boron and does not easily yield quantitative measurement of boron.…”

Section: Alloy Coupon Oxidation Testingcontrasting

confidence: 61%

“…This included Alloy 1 (T1, MoSi 2 , MoB) and Alloy 2 (T1, Mo 5 B 2 Si, Mo 3 Si). Alloy 3 (Mo, Mo 3 Si, T2) was also selected because it contains a tough metal phase and thus has promising mechanical properties [2]. Table I gives the nominal elemental composition of these three alloys and their nominal phase proportions.…”

Section: Discussion Of Current Activities Preparation Of Alloysmentioning

confidence: 99%

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Oxidation Behavior of Mo-Si-B Alloys in Wet Air

Kramer¹,

Thom²,

Degirmen³

et al. 2002

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Multiphase composite alloys based on the Mo-Si-B system are candidate materials for ultra-high temperature applications. In non load-bearing uses such as thermal barrier coatings or heat exchangers in fossil fuel burners, these materials may be ideally suited. The present work investigated the effect of water vapor on the oxidation behavior of Mo-Si-B phase assemblages. Three alloys were studied: Alloy 1 = Mo 5 Si 3

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Section: Alloy Coupon Oxidation Testingcontrasting

confidence: 61%

Section: Discussion Of Current Activities Preparation Of Alloysmentioning

confidence: 99%

Oxidation Behavior of Mo-Si-B Alloys in Wet Air

Kramer¹,

Thom²,

Degirmen³

et al. 2002

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“…The advantage of boron-modified Mo 5 Si 3 over the iron aluminides is its excellent oxidation resistance at temperatures above 800°C resulting from the formation of a protective SiO 2 layer [6,7]. The addition of B lowers the viscosity of the SiO 2 scale, permitting sintering of the scale to close pores.…”

Section: Introductionmentioning

confidence: 99%

FeAl and Mo–Si–B intermetallic coatings prepared by thermal spraying

2004

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FeAl and Mo-Si-B intermetallic coatings for elevated temperature environmental resistance were prepared using high-velocity oxy-fuel (HVOF) and air plasma spray (APS) techniques. For both coating types, the effect of coating parameters (spray particle velocity and temperature) on the microstructure and physical properties of the coatings was assessed. Fe-24Al (wt.%) coatings were prepared using HVOF thermal spraying at spray particle velocities varying from 540 m/s to 700 m/s. Mo-13.4Si-2.6B coatings were prepared using APS at particle velocities of 180 and 350 m/s. Residual stresses in the HVOF FeAl coatings were compressive, while stresses in the APS Mo-Si-B coatings were tensile. In both cases, residual stresses became more compressive with increasing spray particle velocity due to increased peening imparted by the spray particles. The hardness and elastic moduli of FeAl coatings also increased with increasing particle velocity, again due to an increased peening effect. For Mo-Si-B coatings, plasma spraying at 180 m/s resulted in significant oxidation of the spray particles and conversion of the T1 phase into amorphous silica and α-Mo. The T1 phase was retained after spraying at 350 m/s.

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“…Due to differential thermal analysis (DTA) apparatus with mass spectrometry, it is possible to observe type of gases released to the atmosphere during decomposition of any substances. DSC and DTA analysis allows to gain knowledge about glass transition temperature and thermal stability of materials as well as their environmental hazard [6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Copolymers dispersions designed to shaping of ceramic materials

Żurowski

Głuszek

Antosik

et al. 2018

J Therm Anal Calorim

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The paper concerns the synthesis and the characterization of new water-thinnable binder such as poly(acrylic-styrene) with the addition of a new amphiphilic macromonomer and it application in shaping of unmodified and modified (by silanization) Al 2 O 3 by die pressing. The organic additives decomposed thermally to non-toxic gases which is beneficial from ecological point of view. Thus, the careful thermal analysis of synthesized binder was done. To characterize the synthesized binder, the glass transition temperature, wetting angle and diameter of polymer particles size in water were also measured. In the next step of the work, the density, porosity, tensile and bending strength, and microstructure observations have been done for modified and unmodified Al 2 O 3 samples obtained by die pressing. The results confirmed that the synthesized binder is eco-friendly, because it decomposed to non-toxic gases such as carbon dioxide and water vapor during heating up to ca. 527°C. The synthesized binders are characterized by low glass transition temperatures 5.6°C and -0.5°C which are much lower than that of PVA (42°C). It provided the high tensile strength (0.22 ± 0.01 MPa) of green bodies, 57% higher than strength of bodies with commercially available PVA and bending strength around 192 MPa. Density of sintered samples was around 95% of TD. Nevertheless, the best results were obtain for bodies based on modified Al 2 O 3 where tensile strength of green bodies and bending strength of sintered samples were 0.30 ± 0.04 MPa and 237 ± 19 MPa, respectively.

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Oxidation behavior of extruded Mo5Si3Bx–MoSi2–MoB intermetallics from 600°–1600 °C

Cited by 50 publications

References 24 publications

Oxidation Behavior of Mo-Si-B Alloys in Wet Air

Oxidation Behavior of Mo-Si-B Alloys in Wet Air

FeAl and Mo–Si–B intermetallic coatings prepared by thermal spraying

Copolymers dispersions designed to shaping of ceramic materials

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