The Effects of Rare Earth Element on the Al-Ti-B Master Alloy Second Phase

2014 ◽  
Vol 574 ◽  
pp. 380-385
Author(s):  
Hua Hu ◽  
Zhi Liu Hu ◽  
Liang Jie Wei ◽  
Jian Bao Yin
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Master Alloy ◽  
Mass Fraction ◽  
Earth Element ◽  
Intermediate Phase ◽  
Second Phase ◽  
Second Phase Particles ◽  
Master Alloys

Al-Ti-B-RE master alloy is an efficient long-term new refiner. Al-Ti-B-RE refiner was prepared by Al-Ti-B master alloy doped with LaF3, La-rich RE carbonate and Ce respectively. This paper studies the effect of different type and mass fraction of RE on the Second Phase Particles distributions and shape in Master Alloys. The addition of RE have a certain effect of refining TiAl3 and TiB2 intermediate phase. Moreover, it prevents aggregation of TiB2 intermediate phase. As the different type and addition of RE has an effect on the microstructure of master alloy, then the reasonable addition of RE is put forward.

scholarly journals The long-term variations of rare earth element contents in Tamagawa hot spring waters, Akita Prefecture, Japan.

2002 ◽  
Vol 63 (2) ◽  
pp. 135-145 ◽  
Author(s):  
Tetsuya SANADA ◽  
Nobuki TAKAMATSU ◽  
Yuzo YOSHIIKE ◽  
Masayuki IMAHASHI ◽  
Hideo HIGUCHI
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
Hot Spring ◽  
Akita Prefecture ◽  
Element Contents ◽  
Long Term Variations

scholarly journals Effect of CeO2 Size on Microstructure, Synthesis Mechanism and Refining Performance of Al-Ti-C Alloy

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6739
Author(s):  
Yanli Ma ◽  
Taili Chen ◽  
Lumin Gou ◽  
Wanwu Ding
Keyword(s):  
Master Alloy ◽  
Pure Aluminum ◽  
Second Phase ◽  
Formation Temperature ◽  
Scanning Calorimetry ◽  
Synthesis Mechanism ◽  
Second Phase Particles ◽  
Master Alloys ◽  
Refining Performance ◽  
Commercial Pure Aluminum

The effects of CeO2 size on the microstructure and synthesis mechanism of Al-Ti-C alloy were investigated using a quenching experiment method. A scanning calorimetry experiment was used to investigate the synthesis mechanism of TiC, the aluminum melt in situ reaction was carried out to synthesize master alloys and its refining performance was estimated. The results show that the Al-Ti-C-Ce system is mainly composed of α-Al, Al3Ti, TiC and Ti2Al20Ce. The addition of CeO2 obviously speeds up the progress of the reaction, reduces the size of Al3Ti and TiC and lowers the formation temperature of second-phase particles. When the size of CeO2 is 2–4 μm, the promotion effect on the system is most obvious. The smaller the size of CeO2, the smaller the size of Al3Ti and TiC and the lower the formation temperature. Al-Ti-C-Ce master alloy has a significant refinement effect on commercial pure aluminum. When the CeO2 size is 2–4 μm, the grain size of commercial pure aluminum is refined to 227 μm by Al-Ti-C-Ce master alloy.

scholarly journals Influence of Rare Earth Element (Y) on Microstructure and Corrosion Behavior of Hot Extrusion AZ91 Magnesium Alloy

Materials ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 3651 ◽  
Author(s):  
Yanan Cui ◽  
Yonghai Wang ◽  
Zhongyu Cui ◽  
Wenlong Qi ◽  
Jidong Wang ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Rare Earth ◽  
Corrosion Behavior ◽  
Rare Earth Element ◽  
Earth Element ◽  
Volume Fraction ◽  
Reduction Rate ◽  
Mg Alloy ◽  
Second Phase ◽  
Az91 Magnesium Alloy

The influence of rare earth element (RE) Y on the microstructure and corrosion behavior of extruded AZ91 Mg alloy was surveyed via morphology characterization and corrosion performance measurements. The results indicate the corrosion resistance of the transversal section of AZ91 Mg alloy containing Y was improved compared with AZ91 Mg alloy without Y. The corrosion resistance of the longitudinal section of AZ91 Mg alloy with Y was lower than that of AZ91 Mg alloy without Y. The change of corrosion resistance can be attributed to the dispersion and volume fraction of the second phase, the effect of cathodic reduction rate, and the refined second phase.

The Effect of Process Parameter on the Second Phase Particles in Al-Ti-B Master Alloys

2014 ◽  
Vol 900 ◽  
pp. 100-104
Author(s):  
Liang Jie Wei ◽  
Hua Hu ◽  
Zhi Liu Hu ◽  
Yan Jun Zhao
Keyword(s):  
Reaction Time ◽  
Process Parameters ◽  
Master Alloy ◽  
Pure Titanium ◽  
Process Parameter ◽  
Second Phase ◽  
Grain Refiner ◽  
Second Phase Particles ◽  
Master Alloys

Al-Ti-B master alloy is an efficient and practical aluminum grain refiner. This paper studies the effect of process parameter on the Second Phase Particles distributions and shape in Al-Ti-B Master Alloys by casting of pure titanium particale method. Emphatically studied three factors of feeding order, superheating temperature and reaction time , then the reasonable process parameters are put forward.

RARE EARTH ELEMENT AND THORIUM ASSAYING IN PARTS OF THE EAST COAST, INDIA

2016 ◽  
Author(s):  
Shayantani Ghosal ◽  
◽  
Sudha Agrahari ◽  
Debashish Sengupta
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
East Coast
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