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Table of Contents | April, 2017  Vol. 55   No.4 Previous Issue | Next Issue | Archive
In this issue:

Review papers
213 High Temperature Properties and Recent Research Trend of Mg-RE Alloys
Mg-RE계 고온용 합금의 특성과 최근 연구 동향
Soo Woo Nam
Korean J. Met. Mater. 2017;55(4):213-221.   Published online 2017 Apr 6
DOI: https://doi.org/10.3365/KJMM.2017.55.4.213

For the applications in automotive, aircraft, aerospace, and electronic industries, the lightest structural Mg alloys have received much attention since 2000. There has been some progress for the improvement of the mechanical properties such as room temperature strength, formability and mechanical anisotropy. However, the high temperature strength of Mg alloys..... More

       Crossref 4
Research Papers
222 High-temperature Corrosion of AlCrTiSiN Film in Ar-1%SO2 Gas
Poonam Yadav, Sik Chol Kwon, Yue Lin, Shihong Zhang, Dong Bok Lee
Korean J. Met. Mater. 2017;55(4):222-226.   Published online 2017 Apr 6
DOI: https://doi.org/10.3365/KJMM.2017.55.4.222

An AlCrTiSiN film composed of 31Al-15Cr-1.7Ti-0.5Si-51.8N (at%) was deposited on a steel substrate by arc ion plating to a thickness of 1 μm. It consisted of nano crystalline hcp-AlN and fcc-CrN. Its corrosion behavior in Ar-1%SO2 gas at 800 ℃ for 5-50 h was studied. The resulting scales consisted primarily..... More

227 The Effects of Particle Size on the Surface Properties of an HVOF Coating of WC-Co
WC-Co 초고속 화염용사코팅 표면특성에 미치는 분말입자의 크기
Tong Yul Cho, Jae Hong Yoon, Sang Hwan Yoon, Yun Kon Joo, Won Ho Choi, Young Bok Son
조동율, 윤재홍, 윤상환, 주윤곤, 최원호, 손영복
Korean J. Met. Mater. 2017;55(4):227-231.   Published online 2017 Apr 6
DOI: https://doi.org/10.3365/KJMM.2017.55.4.227

The effects of particle size on the surface properties of HVOF spray coating were studied to improve of the durability of metal components. Micro and nano sized WC-12Co powders were coated on the surface of Inconel718, and the effects of particle size on surface properties were studied. Surface hardness was..... More

       Crossref 5
232 Solder Joint Fatigue Life of Flexible Impact Sensor Module for Automotive Electronics
자동차 에어백용 플렉시블 충격센서 모듈의 솔더 접합부 피로수명
Ji-Yeon Park, Mi-Song Kim, Chulmin Oh, Sang Hyeon Do, Jong Dock Seo, Dae Keun Kim, Won Sik Hong
박지연, 김미송, 오철민, 도상현, 서종덕, 김대근, 홍원식
Korean J. Met. Mater. 2017;55(4):232-239.   Published online 2017 Apr 6
DOI: https://doi.org/10.3365/KJMM.2017.55.4.232

To improve the sensitivity of impact sensor modules for automotive air bag systems, we developed a flexible module. The impact sensor was soldered with Sn-3.0Ag-0.5Cu (SAC305) solder on a flexible printed circuit board (FPCB) with an organic solderability preservative (OSP) surface finish. Thermal shock (TS) is one of the test..... More

       Crossref 8
240 The Effect of Ultrasonic Melt Treatment on the Microstructure and Mechanical Properties of Al-7Si-0.35Mg Casting Alloys
초음파 용탕 처리가 Al-7Si-0.35Mg 알루미늄 합금의 미세조직 및 기계적 특성에 미치는 영향
Soo-Bae Kim, Young-Hee Cho, Jung-Moo Lee, Jae-Gil Jung, Su Gun Lim
김수배, 조영희, 이정무, 정재길, 임수근
Korean J. Met. Mater. 2017;55(4):240-246.   Published online 2017 Apr 6
DOI: https://doi.org/10.3365/KJMM.2017.55.4.240

The effect of ultrasonic melt treatment (UST) on the microstructure and mechanical properties of Al-7Si-0.35Mg (A356) casting alloys was investigated. The particular aim of this study was to analyze the mechanism involved in the strengthening of the A356 alloys when fabricated by UST. The UST had little effect on the..... More

       Crossref 5
247 Separation and Recovery of Precious Metals from Leach Liquors of Spent Electronic Wastes by Solvent Extraction
Thi Hong Nguyen, Lingyun Wang, Man Seung Lee
Korean J. Met. Mater. 2017;55(4):247-255.   Published online 2017 Apr 6
DOI: https://doi.org/10.3365/KJMM.2017.55.4.247

Solvent extraction was employed to recover precious metals (Au (III), Pd (II) and Pt (IV)) from the leach solution of spent electronic wastes containing Cu (II), Cr (III) and Fe (III). First, pure Fe (III) and Au (III) were recovered by simultaneous extraction with Cyanex 923 followed by selective stripping..... More

       Crossref 16
255 Study of the Morphological, Structural, Optical and Photoelectrochemical Properties of Zinc Oxide Nanorods Grown Using a Microwave Chemical Bath Deposition Method
마이크로파 화학 용액 증착법을 이용하여 성장시킨 ZnO 나노로드의 형태학적, 구조적, 광학적 그리고 광전기화학적 특성 변화 연구
Sungjin Oh, Hyukhyun Ryu, Won-Jae Lee
오성진, 류혁현, 이원재
Korean J. Met. Mater. 2017;55(4):255-263.   Published online 2017 Apr 6
DOI: https://doi.org/10.3365/KJMM.2017.55.4.255

In this study, zinc oxide (ZnO) nanostructures were grown on a ZnO-buffered fluorine-doped tin oxide (FTO) substrate using a microwave chemical bath deposition method with different zinc oxide precursor concentrations from 0.01 to 0.5 M. We investigated the effects of the zinc oxide precursor concentration on the morphological, structural, optical..... More

       Crossref 4
264 Fabrication of Porous Titania Particles from Complex Fluids by Spray Drying Process and Their Applications
Young-Sang Cho
Korean J. Met. Mater. 2017;55(4):264-273.   Published online 2017 Apr 6
DOI: https://doi.org/10.3365/KJMM.2017.55.4.264

In this study, a spray drying system was used to prepare macroporous titania micro-particles for applications including UV blocking materials and photocatalysts. To synthesize the macroporous particles a colloidal templating method using polymeric beads as sacrificial templates and a titania nano-colloid as precursor material was adopted. The resulting porous titania..... More

       Crossref 1
274 Design of Silicon Plano Convex Lens for Optimized Light Coupling Between Laser Diodes and Single Mode Optical Fiber
레이저 다이오드와 단일 모드 광섬유 간의 광 결합 최적화를 위한 실리콘 플라노 컨벡스 렌즈 설계
In Yup Hwang, Jongoh Park, Jun-Seok Ha, Sang-Wan Ryu
황인엽, 박종오, 하준석, 류상완
Korean J. Met. Mater. 2017;55(4):274-283.   Published online 2017 Apr 6
DOI: https://doi.org/10.3365/KJMM.2017.55.4.274

High speed and large capacity optical communication networks are needed to meet the demands of increased traffic being created by mobile services. Advanced optical communication systems are based on high performance optical device modules that have small footprints and low power consumption. A microlens with a short coupling length and..... More

284 Sol-Gel Synthesis of Phosphate-Based Glasses for Hydrophilic Enamel Applications
졸-겔법을 이용한 친수 기능성 법랑용 인산염계 유리 합성
Dae-Sung Kim, Bong-ki Ryu
김대성, 류봉기
Korean J. Met. Mater. 2017;55(4):284-289.   Published online 2017 Apr 6
DOI: https://doi.org/10.3365/KJMM.2017.55.4.284

In this study, quaternary phosphate-based sol-gel derived glasses were synthesized from a P2O5-CaO-Na2O-TiO2 system with a high TiO2 content of up to 50 mol%. The sol-gel method was chosen because incorporating a high percentage of titanium into a phosphate network via traditional melt-quench methods is non-trivial. The structure and thermal..... More

290 Physical Properties of AR-Glass Fibers in Continuous Fiber Spinning Conditions
연속섬유 방사 조건에 따른 AR-glass 섬유의 물리적 특성
Ji-Sun Lee, MiJai Lee, Tae-Young Lim, Youngjin Lee, Dae-Woo Jeon, Soong-Keun Hyun, Jin-Ho Kim
이지선, 이미재, 임태영, 이영진, 전대우, 현승균, 김진호
Korean J. Met. Mater. 2017;55(4):290-295.   Published online 2017 Apr 6
DOI: https://doi.org/10.3365/KJMM.2017.55.4.290

In this study, a glass fiber is fabricated using a continuous spinning process from alkali resistant (AR) glass with 4 wt% zirconia. In order to confirm the melting properties of the marble glass, the raw material is placed into a Pt crucible and melted at 1650 ℃ for 2 h,..... More

       Crossref 3
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