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Research Papers
Improvement of Alumina Dissolution from the Mechanically Activated Dross Using Ultrasound-Assisted Leaching
Thi Thuy Nhi Nguyen and Man Seung Lee

Published online 2019 Feb 14
Abstract
Aluminum dross results from the re-melting of used aluminum cans, and is a valuable resource containing alumina. In general, aluminum dross contains oxides of Al, Ca, Fe, Mg, Si and Ti and some salts. As a continuation of the previous work to recover pure alumina from the dross, the effect... More
      
화상인식을 이용한 Al-Si 주조용 합금의 화학조성 예측
정상준· 황인규· 조인성· 김희수

Published online 2019 Feb 14
Abstract
In this study, we analyzed the chemical composition of Al-Si cast alloys from microstructural images, using image recognition and machine learning. Binary Al-Si alloys of Si = 1~10 wt% were cast and prepared as reference images in the dataset used for machine learning. The machine learning procedure was constructed with... More
      
AISI 1045 강의 인장 및 고주기 피로 특성에 미치는 Cr 도금층 두께의 영향
함기수 · 강연지 · 김형준 · 윤상훈 · 이기안

Received 2019 Jan 4     Accepted 2019 Jan 28     Published online 2019 Feb 14
Abstract
This study investigated and compared the tensile and high-cycle fatigue properties of AISI 1045 steel and Cr electroplated AISI 1045 steel. First, tensile and fatigue specimens were machined from AISI 1045 steel (substrate), and two kinds of Cr electroplating layers with different layer thickness were applied. The substrate, AISI 1045... More
      
Extraction behavior of hydrogen ion by an ionic liquid mixture of Aliquat 336 and Cyanex 272 in chloride solution
Minh Nhan Le, Seong Ho Son, and Man Seung Lee

Received 2018 Dec 31     Accepted 2019 Jan 18     Published online 2019 Feb 8
Abstract
During the extraction of metal ions from a weak acidic chloride solution by ionic liquids consisting of an organophosphorus extractant and Aliquat 336, the equilibrium pH is sometimes observed to be higher than the initial pH. To compare the hydrogen ion extraction behavior of tertiary and quaternary amines, Alamine 336, Aliquat... More
      
β/B2상을 포함한 Ti-Al-Mo-Nb 합금의 산화 거동과 실리콘 화합물 코팅을 통한 내산화성 개선
최광수 · 송영범 · 이승훈 · 박준식

Published online 2019 Feb 8
Abstract
Alloys containing the β/B2 phases of Ti-45Al-3Mo, Ti-45Al-3Mo-2Nb and Ti-45Al-5Mo were prepared using an vacuum arc-melting machine. Heat-treatments were carried out at 1250 oC in an Ar atmosphere. The temperature of 1250 oC is the temperature region of phase α + γ + (β/B2), and the heat treatment condition which improves... More
      
Effects of Zn(BH4)2, Ni, and/or Ti Doping on the Hydrogen-Storage Features of MgH2
Myoung Youp Song and Young Jun Kwak

Received 2018 Nov 27     Accepted 2019 Jan 18     Published online 2019 Feb 8
Abstract
In the present work, MgH2 was doped with Zn(BH4)2, Ni, and/or Ti to improve its hydrogen absorption and release features. Samples were prepared by grinding in a planetary ball mill in a hydrogen atmosphere. To increase the hydrogen absorption and release rates without significantly sacrificing hydrogenstorage capacity the additive percentages were... More
      
저온 200 oC에서 잉크젯인쇄에 의한 금속산화물 박막트랜지스터의 아연도핑 효과
최운섭

Received 2018 Nov 19     Accepted 2019 Jan 26     Published online 2019 Feb 8
Abstract
Amorphous oxide semiconductors have attracted much attention due to their good electrical properties with wide band gaps and low cost process, which are capable of backplane for displays. However, there are some issues regarding low temperature process with high mobility and printing capability. Inkjet is an attractive technology for high resolution... More
      
합금화 용융아연도금 핫스탬핑강의 자동차 차체 적용을 위한 부식 거동, 액상금속취화현상 및 점용접성 연구
황연정 · 이창욱 · 신가영 · 유지홍 · 최민수

Received 2018 Oct 17     Accepted 2019 Jan 18     Published online 2019 Feb 8
Abstract
The hot stamping process is beneficial for fabricating high strength automotive parts without spring back. To suppress high temperature oxidation and decarburization, it is necessary to coat the hot stamped steel. In the present work, the performance of galvannealed coated (GA) hot stamped steel was evaluated. During cyclic corrosion tests, the... More
      
코크스와 염소가스에 의한 일메나이트 광석 중 Fe의 선택염화 제거
이소영 · 박성훈 · 손호상

Received 2018 Oct 1     Accepted 2019 Jan 21     Published online 2019 Feb 8
Abstract
This study on the chlorination of ilmenite ore was carried out using chlorine gas and coke as the chlorinating and reduction agents in a static bed reactor for the selective removal of iron. The effect of the amount of coke, the partial pressure of the chlorine gas and the reaction... More
      
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