Phase formation, glass forming ability, mechanical and thermal properties of Cu50Zr50−x Al x (0⩽x⩽11.0) glass forming alloys

The effect of Yb3+ ions on upconversion luminescence and thermal properties of Tm3+/Yb3+ co-doped La2O3-Nb2O5-Ta2O5 glasses has been studied. Glass transition temperature is around 740 °C, indicating high thermal stability. The effect of Yb3+ ions on the thermal stability is not obvious. Both the glass forming ability and the upconversion luminescence first increase and then decrease with the increase of Yb3+ ions. The glasses perform low glass forming ability with ΔT around 55 °C. Blue and red emissions centered around 477, 651, and 706 nm are obtained at the excitation of 976 nm laser. The upconversion luminescence mechanism is energy transfer from Yb3+ to Tm3+ mixed with two- and three- photon processes. The thermal kinetic Differential Thermal Analysis (DTA)-analysis indicates that the average activation energy first increases and then decreases with the increase of Yb3+ ions. This result can be introduced in order to improve upconversion luminescence of glasses by crystallization in the future. Tm3+/Yb3+ co-doped La2O3-Nb2O5-Ta2O5 glasses with good upconversion and thermal properties show promising applications in solid-state laser, optical temperature sensing.

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Glass-forming ability, thermal properties, and corrosion resistance of Fe-based (Fe, Ni, Mo, Cr)-P-C-B metallic glasses

Journal of Non-Crystalline Solids ◽

10.1016/j.jnoncrysol.2017.09.028 ◽

2017 ◽

Vol 476 ◽

pp. 75-80 ◽

Cited By ~ 6

Author(s):

Siwen Wang ◽

Yanhui Li ◽

Xuewei Wang ◽

Shinichi Yamaura ◽

Wei Zhang

Keyword(s):

Corrosion Resistance ◽

Thermal Properties ◽

Metallic Glasses ◽

Glass Forming Ability ◽

Glass Forming

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A general and transferable deep learning framework for predicting phase formation in materials

npj Computational Materials ◽

10.1038/s41524-020-00488-z ◽

2021 ◽

Vol 7 (1) ◽

Author(s):

Shuo Feng ◽

Huadong Fu ◽

Huiyu Zhou ◽

Yuan Wu ◽

Zhaoping Lu ◽

...

Keyword(s):

Deep Learning ◽

Phase Formation ◽

Periodic Table ◽

Glass Forming Ability ◽

High Entropy Alloys ◽

New Materials ◽

High Entropy ◽

Learning Framework ◽

Glass Forming ◽

Small Dataset

AbstractMachine learning has been widely exploited in developing new materials. However, challenges still exist: small dataset is common for most tasks; new datasets, special descriptors and specific models need to be built from scratch when facing a new task; knowledge cannot be readily transferred between independent models. In this paper we propose a general and transferable deep learning (GTDL) framework for predicting phase formation in materials. The proposed GTDL framework maps raw data to pseudo-images with some special 2-D structure, e.g., periodic table, automatically extracts features and gains knowledge through convolutional neural network, and then transfers knowledge by sharing features extractors between models. Application of the GTDL framework in case studies on glass-forming ability and high-entropy alloys show that the GTDL framework for glass-forming ability outperformed previous models and can correctly predicted the newly reported amorphous alloy systems; for high-entropy alloys the GTDL framework can discriminate five types phases (BCC, FCC, HCP, amorphous, mixture) with accuracy and recall above 94% in fivefold cross-validation. In addition, periodic table knowledge embedded in data representations and knowledge shared between models is beneficial for tasks with small dataset. This method can be easily applied to new materials development with small dataset by reusing well-trained models for related materials.

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Glass-Forming Ability, Interface Joint Strength and Thermal Properties of Sealing Glasses for SOFC

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.353-358.1536 ◽

2007 ◽

Vol 353-358 ◽

pp. 1536-1539

Author(s):

Y.J. Chen ◽

Y.P. Chen ◽

Wen Cheng J. Wei

Keyword(s):

Thermal Properties ◽

Joint Strength ◽

Glass Forming Ability ◽

Glass Forming

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Glass Forming Ability and Thermal Properties of the Mg-Based Amorphous Alloys with Dual Rare Earth Elements Addition

MATERIALS TRANSACTIONS ◽

10.2320/matertrans.mj200738 ◽

2007 ◽

Vol 48 (7) ◽

pp. 1684-1688 ◽

Cited By ~ 8

Author(s):

J. S. C. Jang ◽

C. C. Tseng ◽

L. J. Chang ◽

C. F. Chang ◽

W. J. Lee ◽

...

Keyword(s):

Thermal Properties ◽

Rare Earth ◽

Rare Earth Elements ◽

Amorphous Alloys ◽

Glass Forming Ability ◽

Glass Forming

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Effect of ZrO2 and MgO Addition on Structure, Mechanical and Thermal Properties of Metakaolin-Based Geopolymer Composites

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.798.298 ◽

2019 ◽

Vol 798 ◽

pp. 298-303 ◽

Cited By ~ 1

Author(s):

Rewadee Wongmaneerung

Keyword(s):

Thermal Conductivity ◽

Compressive Strength ◽

Thermal Properties ◽

Phase Formation ◽

Sodium Hydroxide Solution ◽

Conductivity Measurement ◽

Green Building ◽

Sodium Silicate Solution ◽

Mechanical And Thermal Properties ◽

Geopolymer Composites

This research studies the fabrication and properties of reinforced-geopolymer composites for Green Building. The study comprises of phase formation, microstructure, mechanical and thermal properties. Metakaolin-based geopolymer has been fabricated from calcined kaolin at 750 °C for 6 h. Sodium hydroxide solution with 10 M and sodium silicate solution were used as alkaline activators. The ratio between metakaolin and solution was 1:1.25. Two reinforcements; ZrO2 and MgO at the composition of 0, 1, 3, 5, 7 and 9 wt% were added, then well-mixed together. After casting in acrylic mold, samples were cured at 50 °C for 72 h and then stored in air for 7 and 28 days. Phase formation, microstructure, compressive strength and thermal conductivity were determined by XRD, SEM, universal testing and thermal conductivity measurement, respectively. The results revealed that after stored for 28 days, XRD patterns of geopolymer with and without reinforcements show typical amorphous characteristic. Microstructure observation revealed the dense and heterogenous. The addition both of reinforcements has no effect on the geopolymerization reaction. Compressive strength tends to increase with increasing the amount of MgO content. Moreover, thermal conductivity slightly increased with the amounts of ZrO2 and MgO increase.

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Crystallization Behavior and Thermal Analysis of CoFeB Thin Films

Journal of Nanomaterials ◽

10.1155/2015/371894 ◽

2015 ◽

Vol 2015 ◽

pp. 1-6 ◽

Cited By ~ 3

Author(s):

Jiun-Yi Tseng ◽

Yuan-Tsung Chen ◽

Z. G. Chang ◽

C. W. Wu ◽

L. C. Yang

Keyword(s):

Thin Films ◽

Activation Energy ◽

Thermal Analysis ◽

Thermal Properties ◽

Crystallization Behavior ◽

Glass Forming Ability ◽

Dc Magnetron Sputtering ◽

Glass Substrates ◽

Glass Forming ◽

Onset Crystallization Temperature

We examined two targets containing Co40Fe40B20and Co60Fe20B20. We deposited Co40Fe40B20and Co60Fe20B20monolayer thin films of various thicknesses on glass substrates through DC magnetron sputtering; the thicknesses ranged from 25 to 200 Å. The thermal properties of the Co40Fe40B20and Co60Fe20B20thin films were determined using a differential scanning calorimeter (DSC). The thermal properties included the glass transition temperature (Tg), onset crystallization temperature (Tx), and glass-forming ability, which were determined according to these values. Using the Kissinger formula revealed that the activation energy of the Co60Fe20B20with a thickness of 75 Å is the highest, implying that crystallization was the lowest and the Co60Fe20B20film showed anticrystallization properties. However, the energy of 75 Å Co40Fe40B20thin films was the lowest, which is opposite to that of Co60Fe20B20. This observation can be reasonably explained based on the concentration of Co or Fe. Therefore, a thickness of 75 Å is critical.

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Bulk Metallic Glasses: Aluminum-Based

Encyclopedia of Aluminum and Its Alloys ◽

10.1201/9781351045636-140000405 ◽

2019 ◽

Author(s):

B.J. Yang ◽

J.H. Yao ◽

J.Q. Wang ◽

Y.S. Chao ◽

E. Ma

Keyword(s):

Thermal Stability ◽

Glass Transition ◽

Thermal Properties ◽

Metallic Glasses ◽

Bulk Metallic Glasses ◽

Systematic Investigation ◽

Glass Forming Ability ◽

Atomic Cluster ◽

Glass Forming ◽

Thermal Stability Of

This paper details a systematic investigation of the formation of Al-based bulk metallic glasses, expanding on an earlier brief report.[] We discuss an approach for designing and predicting the best glass-forming composition in the Al–TM–RE systems, based on the atomic cluster packing model for the internal structure of the glass. The effects of additional elements in quaternary and quinary systems on the glass-forming ability and thermal stability of the glasses are also discussed. Three new compositions, Al86Ni6Y4.5Co2La1.5, Al86Ni7Y5Co1La1 and Al86Ni7Y4.5Co1La1.5, are capable of forming fully glassy rods of 1 mm in diameter; their glass transition and other thermal properties are systematically characterized.

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