Previous issue | > Previous issue |

|
|
|
|
716 |
Effect of Second Aging Treatment on the Microstructure and Mechanical Properties of SUH660 Alloy
SUH660합금의 미세조직 및 기계적 특성에 미치는 2차 시효 열처리의 영향
Do-Hoon Kim, You-Hwan Lee, Jeoung Han Kim김도훈, 이유환, 김정한
Korean J. Met. Mater. 2016;54(10):716-722. Published online 2016 Oct 5 DOI: https://doi.org/10.3365/KJMM.2016.54.10.716
Abstract
nSUH660 is a precipitation hardening stainless steel which has high strength at moderately high temperature. In this study, the effect of a secondary aging-treatment after the standard 720 °C heat-treatment was investigated. The Rockwell C hardness test with detailed TEM observerations was performed to study the steel’s hardening mechanism. The..... More
|
|
|
723 |
Effect of Added Magneisum on the Coating Properties of Galvanized Steel Sheets
용융아연 도금특성에 미치는 Mg 미량첨가 영향
Moon-Hi Hong, Deok-Gu Kang, Doo-Jin Paik, Hyeon-Seok Hwang, Sung-ho Park홍문희, 강덕구, 백두진, 황현석, 박성호
Korean J. Met. Mater. 2016;54(10):723-731. Published online 2016 Oct 5 DOI: https://doi.org/10.3365/KJMM.2016.54.10.723
Abstract
The effect of a small amount of added Mg on the microstructure, Fe-Al inhibition layer, corrosion resistance and welding properties of hot-dip galvanized and galvannealed steel sheets were investigated. Both the microstructure and distribution of Mg were measured by scanning electron microscopy, transmission electron microscopy, glow discharge spectrometer and electron..... More
|
|
|
732 |
Experimental and Simulation Analysis of Hot Isostatic Pressing of Gas Atomized Stainless Steel 316L Powder Compacts
Dongguo Lin, Sangyul Ha, Youngho Shin, Dong Yong Park, Seong Jin Park, Sung Taek Chung, Ravi Bollina, Seongkyu See
Korean J. Met. Mater. 2016;54(10):732-742. Published online 2016 Oct 5 DOI: https://doi.org/10.3365/KJMM.2016.54.10.732
Abstract
In this work, both experimental and numerical studies were conducted to investigate the densification behavior of stainless steel 316L (STS 316L) powders during hot isostatic pressing (HIP), and to characterize the mechanical properties of HIPed specimens. The HIP experiments were conducted with gas atomized STS 316L powders with spherical particle..... More
|
|
|
743 |
Carbothermal Reduction of Oxide of WC/Co Hardmetal Scrap
WC/Co 초경 스크랩 산화물의 환원/침탄 반응
CheolMin Kwon, Gil-Geun Lee, Gook-Hyun Ha권철민, 이길근, 하국현
Korean J. Met. Mater. 2016;54(10):743-751. Published online 2016 Oct 5 DOI: https://doi.org/10.3365/KJMM.2016.54.10.743
Abstract
This study conducted an analysis of the carbothermal reduction of oxidized WC/Co hardmetal scrap with solid carbon under an argon and hydrogen gas atmosphere. The WC/Co hardmetal scrap oxide consisted of WO 3 and CoWO 4. WO 3 was reduced before CoWO 4 by the solid carbon regardless of gas atmosphere. The simple oxide..... More
|
|
|
752 |
Synthesis and Sintering Behavior of Cordierite Prepared from Multi-Component Materials Including Alkaline-Earth Minerals
다성분 원료를 사용한 코디어라이트 내열재료 제조 및 알칼리계 원료 첨가 효과
Suk-In Jeong, Nam-Il Kim, Sang-Jin Lee정숙인, 김남일, 이상진
Korean J. Met. Mater. 2016;54(10):752-758. Published online 2016 Oct 5 DOI: https://doi.org/10.3365/KJMM.2016.54.10.752
Abstract
Cordierite was synthesized using multi-component materials based on a talc-alumina-clay system. The cordierite sintered at 1360 °C showed a high relative density of 98.8% and a low thermal expansion coefficient of 1.59×10 -6/°C. To study the effect of adding alkaline-earth minerals on the cordierite properties, petalite, potash-feldspar, and dicalcium phosphate were..... More
|
|
|
759 |
Effect of Cold Drawing and Heat Treatment on the Microstructure of Invar36 Alloy Wire
Invar 36 합금 선재의 미세조직에 미치는 냉간 인발 및 열처리 공정의 영향
Seung Youb Han, Seon Ah Jang, Hee-Chul Eun, Jung-Hoon Choi, Ki Rak Lee, Hwan Seo Park, Do-Hee Ahn, Soo Young Kim, Jea Youl Kim, Sang Yong Shin한승엽, 장선아, 은희철, 최정훈, 이기락, 박환서, 안도희, 김수영, 김재열, 신상용
Korean J. Met. Mater. 2016;54(10):759-767. Published online 2016 Oct 5 DOI: https://doi.org/10.3365/KJMM.2016.54.10.759
Abstract
In this study, the effect of cold drawing and heat treatment on the microstructure of Invar36 alloy wire was investigated. Invar36 alloy wire is used as a transmission line core material, and is required to have high strength. The diameter of the Invar36 alloy wire specimens were reduced from 16..... More
|
|
|
768 |
Effect of HCl Concentration on the Oxidation of LIX 63 and the Subsequent Separation of Pd(II), Pt(IV), Ir(IV) and Rh(III) by Solvent Extraction
Thi Hong Nguyen, Man Seung Lee
Korean J. Met. Mater. 2016;54(10):768-774. Published online 2016 Oct 5 DOI: https://doi.org/10.3365/KJMM.2016.54.10.768
Abstract
During the selective extraction of Pd(II) by LIX 63 from 6 M HCl solutions containing platinum group metals, an oxidation-reduction reaction occurs between the LIX 63 and Ir(IV). Since the reduced Ir(III) cannot be extracted by solvating and amine extractants, the oxidation-reduction reaction has a significant effect on the separation..... More
|
|
|
775 |
Effect of Post-Deposition Annealing on the Structural, Optical and Electrical Properties of Ti-doped Indium Oxide Thin Films
Sung-Bo Heo, Hyun-Joo Moon, Jeong-Hyeon Oh, Young-Hwan Song, Tae-Young Eom, Jun-Ho Kim, Daeil Kim
Korean J. Met. Mater. 2016;54(10):775-779. Published online 2016 Oct 5 DOI: https://doi.org/10.3365/KJMM.2016.54.10.775
Abstract
Ti-doped In 2O 3 (TIO) thin films were deposited on glass substrates by RF magnetron sputtering. The films were then annealed at 100, 200 or 300 °C for 30 min to investigate the effects of the annealing temperature on the films’ structural, electrical and optical properties. The films annealed at 200 °C..... More
|
|
|
780 |
Fabrication of Si/SiOx Anode Materials by a Solution Reaction-Based Method for Lithium Ion Batteries
Hyeon-Woo Yang, Jung-Ho Lee, Sang-Chul Jung, Seung-Taek Myung, Woo-Seung Kang, Sun-Jae Kim
Korean J. Met. Mater. 2016;54(10):780-786. Published online 2016 Oct 5 DOI: https://doi.org/10.3365/KJMM.2016.54.10.780
Abstract
Si/SiO x composite anodes were prepared using a facile solution reaction-based method. Their initial capacity was significantly improved to 1.3 times that of SiO x by incorporating 3 wt% silicon nanoparticles into the SiO x. The capacity retention of the Si/SiO x anodes after 50 charge-discharge cycles was significantly enhanced, to 99%, compared with..... More
|
|
|
787 |
Catalytic Activity and Surface Characteristics of WO3-doped MnOx-TiO2 Catalysts for Low-temperature Selective Catalytic Reduction of NOx with NH3
Byeongkil Shin, Heesoo Lee, Hyun Park
Korean J. Met. Mater. 2016;54(10):787-792. Published online 2016 Oct 5 DOI: https://doi.org/10.3365/KJMM.2016.54.10.787
Abstract
The effect of added WO 3 on the catalytic activity and surface characteristics of the MnO x-TiO 2 system was investigated for the low-temperature selective catalytic reduction of NO x with NH 3. Based on physio-chemical characterizations, the specific surface areas of the WO 3-MnO x-TiO 2 catalysts increased from 76.12 m 2/g to 90.29 m 2/g as the WO 3... More
|
|
|
|
|