Zobrazeno 1 - 10
of 83
pro vyhledávání: '"Kap-Ho Lee"'
Enhancement of the Mechanical Properties in Al–Si–Cu–Fe–Mg Alloys with Various Processing Parameters
Autor:
Su-Seong Ahn, Sharief Pathan, Jar-Myung Koo, Chang-Hyun Baeg, Chan-Uk Jeong, Hyoen-Taek Son, Yong-Ho Kim, Kap-Ho Lee, Soon-Jik Hong
Publikováno v:
Materials, Vol 11, Iss 11, p 2150 (2018)
In this research, various processing conditions were implemented to enhance the mechanical properties of Al-Si alloys. The silicon content was varied from hypoeutectic (Si-10 wt.%) to eutectic (Si-12.6 wt.%) and hypereutectic (Si-14 wt.%) for the pre
Externí odkaz:
https://doaj.org/article/10c7ff804822433dbb0e0212b5444e23
Publikováno v:
Materials Research Letters, Vol 6, Iss 12, Pp 689-695 (2018)
Dislocation creep behaviors of CoCrFeMnNi were investigated at intermediate temperatures. Shape of creep curves, stress exponents and the activation energies at high stresses (>40 MPa) were distinctly different from those at low stresses, suggesting
Externí odkaz:
https://doaj.org/article/c2343abb12764aceb11ded34ae6c4619
Autor:
Dong-soo Kim, Eun Bin Kim, Soon-Jik Hong, Kap-Ho Lee, Jong-Hyeon Lee, Dae-Hwan Jang, Chul-Hee Lee, Jae-Kyo Yang, Peyala Dharmaiah
Publikováno v:
Journal of Alloys and Compounds. 777:703-711
A lot of efforts being invested into producing efficient thermoelectric devices based on Bi0.5Sb1.5Te3 materials for room temperature applications. Key research achievements of these efforts that incorporation of oxide nanoparticles into Bi0.5Sb1.5Te
Publikováno v:
Scripta Materialia. 162:437-441
The formation mechanism of twin structures in p-type (Bi0.25Sb0.75)2Te3 compound was examined using high-resolution transmission electron microscopy (HR-TEM) and computer simulations. The results shown that the formation of twins is analogous to the
Autor:
Babu Madavali, May Likha Lwin, Soon-Jik Hong, Dong-won Shin, Kap-Ho Lee, Chul-Hee Lee, Peyala Dharmaiah, Gian Song
Publikováno v:
Intermetallics. 103:23-32
Bismuth antimony telluride based thermoelectric (TE) materials have been intensively developed and synthesized using different mechanisms, for the room temperature TE applications. In particular, bismuth antimony telluride based TE alloys are very se
Publikováno v:
Science of Advanced Materials. 10:1105-1112
Autor:
Soon-Jik Hong, Chul-Hee Lee, Kap-Ho Lee, Dong-won Shin, Suk-Min Yoon, Babu Madavali, Cheenepalli Nagarjuna
Publikováno v:
Journal of Korean Powder Metallurgy Institute. 24:357-363
In this study, Bi-Sb-Te thermoelectric materials are produced by mechanical alloying (MA) and spark plasma sintering (SPS). To examine the influence of the milling atmosphere on the microstructure and thermo-electric (TE) properties, a p-type Bi-Sb-T
Publikováno v:
International Journal of Applied Ceramic Technology. 15:125-131
In this research work, p-type BiSbTe/ZnO (2 wt%) nanocomposite powders were fabricated by high-energy ball milling at different milling times, and subsequently, powders were consolidated by spark plasma sintering at 673 K temperature. The existence o
Autor:
Kap Ho Lee, Soon-Jik Hong
Publikováno v:
Scripta Materialia. 137:55-59
The domain structure of the thermoelectric compound (AgSbTe 2 ) 15 (GeTe) 85 was analyzed using high resolution transmission electron microscopy. Numerous coherent domain boundaries of two different types were observed, formed by the polar phase tran
Publikováno v:
Acta Materialia. 128:43-53
(GeTe)x(AgSbTe2)100−x: TAGS thermoelectrics are an attractive class of materials due to their combination of non-toxicity and good conversion efficiency at mid-temperature ranges. In the present work, we have utilized energy and time efficient high