Reinvestigation of the Phase Diagram for the System Titanium–Oxygen

Wahlbeck, P. G.; Gilles, Paul W.

doi:10.1111/j.1151-2916.1966.tb13229.x

Cited by 181 publications

(60 citation statements)

References 17 publications

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“…The aTi ? bTi transformation temperature for Ti is 882.5°C [26]. Figure 2 shows the variation in the shrinkage rate of zirconia and 3Y-ZrO 2 -Ti samples as a function of heating temperature.…”

Section: Resultsmentioning

confidence: 99%

“…The small difference was observed for the temperature of 550°C (a * 8.2 9 10 -6 K -1 ) which could correlate with the beginning of the titanium oxide changes [26,27]. At …”

Section: Materials Characterizationmentioning

confidence: 96%

“…This point could associate with high addition of Ti (10 vol%) which reveal in the aTi ? bTi transformation [26]. Likewise, the curve at the temperature above 1200°C had different characteristics.…”

Section: Materials Characterizationmentioning

confidence: 99%

“…At 650°C, the small decrease in the thermal expansion coefficient was observed (about -2.5 9 10 -6 K -1 ). This range of temperature could correspond with the titanium oxides transformation [26,27]. At the second temperature point (below 1000°C), the thermal expansion coefficient was higher, about 10 9 10 -6 K -1 .…”

Section: Materials Characterizationmentioning

confidence: 99%

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Sintering behavior and thermal expansion of zirconia–titanium composites

Łada

Miazga

Konopka

et al. 2017

J Therm Anal Calorim

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The dilatometric and thermogravimetric methods were used to investigate the sintering conditions of 3Y-ZrO 2 and 3Y-ZrO 2 -Ti composites. For the materials preparation, the nanometric zirconia stabilized by 3 mol% Y 2 O 3 powder and micrometric titanium powder (3 and 10 vol%) were used. The green body samples were formed by slip casting method. The morphology of samples microstructures was determined by SEM observations. The stereological analysis of zirconia and zirconia-titanium composites was carried out using computer program. The density was measured using the Archimedes method. The hardness of sinters was also investigated. Addition of Ti into ZrO 2 influenced the sintering behavior and thermal expansion of obtained composites. The analysis of the sintering process and characteristic temperatures confirmed the increase of onset and final temperature of shrinkage with the increase in Ti content. The changes of the thermal expansion curves for the pure zirconia and 3Y-ZrO 2 -Ti composites were the result of the aTi ? bTi transformation and the transition temperature of the zirconia m ? t transformation. The zirconia and composite samples were characterized by relative density about 98%, close to theoretical density. The slight growth of zirconia grains was observed.

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Section: Resultsmentioning

confidence: 99%

“…The small difference was observed for the temperature of 550°C (a * 8.2 9 10 -6 K -1 ) which could correlate with the beginning of the titanium oxide changes [26,27]. At …”

Section: Materials Characterizationmentioning

confidence: 96%

Section: Materials Characterizationmentioning

confidence: 99%

Section: Materials Characterizationmentioning

confidence: 99%

See 2 more Smart Citations

Sintering behavior and thermal expansion of zirconia–titanium composites

Łada

Miazga

Konopka

et al. 2017

J Therm Anal Calorim

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“…For this hypothesis to be true, the liquefaction temperature of the TRZ complex oxide would need to be lower than the highest temperature encountered during heat treatment (1 723 K). While the melting points of pure Ti oxides, Al2O3, CaO, CeO2, and ZrO2 are much higher than 1 723 K, [31][32][33] it is conceivable that the complex oxide has a much lower liquefaction temperature, such as via eutectic reaction as in the Al2O3-CaO 31) or MnO-TiO2 34) systems, for example. Thus, the orientation relationship between the Zr-rich phase in the TRZ complex oxide and the austenite matrix was further investigated based on analysis of the TEM results.…”

Section: Formation Mechanism Of Af On Ti-rem-zr Complex Oxidementioning

confidence: 99%

Acicular Ferrite Formation on Ti-Rare Earth Metal-Zr Complex Oxides

2015

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Acicular ferrite (AF) formation potency of Ti-Rare earth metal (REM)-Zr (TRZ) complex oxide has been investigated in the simulated heat affected zone of low carbon steel. The TRZ complex oxide shows higher AF formation potency than Ti and Al oxides. A TRZ oxide particle is composed of REM-rich and Zrrich phases. AF crystals nucleate on the interface between austenite and the Zr-rich oxide phase, having a crystal structure that is face-centered cubic with lattice parameter of 0.44 nm. The Zr-rich phase and AF have an orientation relationship described by (011)AF//(011)Oxide, [100]AF//[ ]Oxide (the AF-TRZ orientation relationship), which allows good lattice coherency. It is suggested that the formation of this orientation relationship promotes AF nucleation on TRZ complex oxides. The AF also satisfies the Kurdjumov-Sachs (K-S) orientation relationship with the austenite matrix. It is considered that the coexistence of the AF-TRZ and K-S "three phase" orientation relationships is caused by variant selection of AF in addition to the formation of a rational orientation relationship between the Zr-rich oxide phase and the austenite matrix during the HAZ thermal cycle.KEY WORDS: heat affected zone; Ti-Rare earth metal-Zr complex oxide; acicular ferrite.

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Metal‐Matrix Materials for High‐Temperature Applications with Liquid Aluminum

et al. 2019

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Herein, powder metallurgically processed transformation‐induced plasticity effect (TRIP)‐steel‐matrix composites with additions of TiO2 or Al2O3–TiO2 are investigated for their potentional use as a impact pad in aluminum melting furnaces. The composites contain volume fractions of 10% or 30% ceramic particles dispersed in a CrMnNi‐steel matrix. The formation of ceramic precipitates in the steel and the interactions between the matrix and the ceramic particles during sintering influence the microstructure of the fired materials. TiO2 promotes the formation of Mn–Ti–O spinel‐type structures whereas the Al2O3–TiO2 material induces the additional formation of Ti–Mn–Al–O solid solutions but reduces the densification progress. Despite material changes, the steel matrix undergoes α'‐martensite formation during quasi‐static tensile loading at room temperature in the reference material and in the composite variants. The yield strength in the composite variant with 10 vol% TiO2 increases by 28% (constant with 10 vol% Al2O3–TiO2), whereby the ultimate tensile strength and the fracture strain are lower for all composite variants as compared to the pure steel. The yield strength of the materials after immersion test in liquid aluminum at 800 °C is +80% (10% TiO2) or +29% (10% Al2O3–TiO2) as compared to the corroded steel material.

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Reinvestigation of the Phase Diagram for the System Titanium–Oxygen

Cited by 181 publications

References 17 publications

Sintering behavior and thermal expansion of zirconia–titanium composites

Sintering behavior and thermal expansion of zirconia–titanium composites

Acicular Ferrite Formation on Ti-Rare Earth Metal-Zr Complex Oxides

Metal‐Matrix Materials for High‐Temperature Applications with Liquid Aluminum

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