Interface interaction and wetting of Sc2O3 exposed to Cu–Al and Cu–Ti melts

Barzilai, S.; Nagar, Harsha; Aizenshtein, M.; Froumin, N.; Frage, N.

doi:10.1007/s00339-008-4930-3

Cited by 5 publications

(10 citation statements)

References 11 publications

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“…The compacts were heattreated in air, using a proprietary treatment, followed by a 24 h vacuum (∼3 Pa) treatment at 800 • C to dry them. The pressed and treated compact was then hot isostatically pressed (HIPed) at 1300 • C under a pressure of 130 MPa for 5 h. 4 For Er 2 O 3 , a 99.9% pure powder (China Rare Metals Material Co. Ltd, China) was compacted and processed using a procedure identical to that used for the fabrication of transparent yttria described elsewhere. 40 Briefly the cold pressed pellets were dried and then HIPed at 1350 • C under a pressure of 150 MPa for 1.5 h.…”

Section: Sample Processingmentioning

confidence: 99%

“…Scandia that resembles light element binary rare earth sesquioxides (R 2 O 3 ) 1 -is sometimes considered for high temperature applications [2][3][4] and is also considered as a host material for solid-state lasers, [5][6][7] and as a heat-resistant optical window in solid-state laser. 7 Erbia, Er 2 O 3 possesses high thermal stability and corrosion resistance and is used accordingly.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical and elastic properties of fine-grained polycrystalline scandia and erbia as determined by indentation techniques

Yeheskel

Albayrak

Anasori

et al. 2011

Journal of the European Ceramic Society

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Section: Sample Processingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mechanical and elastic properties of fine-grained polycrystalline scandia and erbia as determined by indentation techniques

Yeheskel

Albayrak

Anasori

et al. 2011

Journal of the European Ceramic Society

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“…For the Ta85 wt%-Ti mixture, a shorter milling time was needed for the powder to fully dissolve, while for the Ta60 wt%-Ti and Ta50 wt%-Ti samples, longer milling times were required. The extent of hexagonal phase dissolution was estimated by normalizing the peak area of [(10-10), (10)(11), (10)(11)(12), (11)(12)(13)(14)(15)(16)(17)(18)(19)(20)] to the total area of the measured pattern. The baseline, corresponding to zero Ti dissolution of each sample, was retrieved from the XRD pattern of a pure Ta-Ti powder mixture before mechanical alloying.…”

Section: Resultsmentioning

confidence: 99%

“…To prevent a chemical reaction between the crucible and the specimen, a thin film of Sc 2 O 3 was deposited using a radio-frequency (rf) magnetron sputtering system on the Al 2 O 3 crucible. Previous studies showed that Sc 2 O 3 can be considered as a relatively stable oxide that barely interacts with Ti [16]. DSC measurements were carried out by continuous heating at 20°C/min with 5 min isothermal holds at 50 and 1000°C in the heating direction.…”

Section: Methodsmentioning

confidence: 99%

Mechanical alloying and thermal analysis of Ta–Ti alloys

Barzilai¹,

Hayun

2015

J Mater Sci

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Tantalum-titanium alloys have widespread potential in biomedical applications due to their superior biocompatibility, favorable mechanical properties, high corrosion resistance, and ability to exhibit shape memory behavior. However, this system is plagued by processing difficulties due to significant differences in melting temperatures, specific weights, and vapor pressures of Ta and Ti. In the present study, mechanical alloying (MA) using high-energy ball milling of Ti-xTa (where x = 50, 60, 70, and 85 wt%) was investigated. The alloyed powders were characterized by X-ray diffraction, electron microscopy (SEM and TEM), and differential scanning calorimetry. It was established that a-Ti (hcp) gradually dissolves into a-Ta (bcc), with the alloyed particles becoming chemically homogeneous as a bcc structure. This structure corresponds to a meta-stable phase and should decompose to yield two solid solutions, Ti-rich hcp and Ta-rich bcc. To overcome this thermodynamic preference, MA-generated Ta-Ti bcc solid solution powders possess relatively high internal strain energy.

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“…3a and d). 11 These differences were well accounted for by a thermodynamic analysis of the interaction in the oxides/Al systems. [10][11][12] For instance, the calculated values of the equilibrium (Sc or Y) content for each system as a function of the Al-Cu composition are shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of interface interactions between thermodynamically stable oxides and Al containing melts

Barzilai

Aizenshtein²,

Froumin

et al. 2011

Advances in Applied Ceramics

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Scandia, yttria and erbia are thermodynamically stable oxides and could be used as a structural material for crucibles, in order to avoid contamination of the melt. These oxides have similar wetting behaviour in contact with aluminium containing melts, but different interaction characteristics and different interfacial products. When yttria and erbia substrates are exposed to Al containing melts, the substrate decomposes, large amounts of Y or Er are released into the melt and a thick interaction layer consisting of a new YAlO 3 or ErAlO 3 phase is formed beneath the drop. These results were not obtained in the Sc 2 O 3 /Al system where only a slight amount of Sc was dissolved in the melt and a thin interfacial layer consisting of Al 2 O 3 was formed. The differences in the mechanism and in the nature of the reaction products of the studied systems are attributed to the thermodynamic properties of the ternary Al-Me-O systems. These properties dictate the sequence of dissolution-precipitation reactions during the wetting experiment and the final equilibrium state for each system.

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Interface interaction and wetting of Sc2O3 exposed to Cu–Al and Cu–Ti melts

Cited by 5 publications

References 11 publications

Mechanical and elastic properties of fine-grained polycrystalline scandia and erbia as determined by indentation techniques

Mechanical and elastic properties of fine-grained polycrystalline scandia and erbia as determined by indentation techniques

Mechanical alloying and thermal analysis of Ta–Ti alloys

Mechanism of interface interactions between thermodynamically stable oxides and Al containing melts

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