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Analysis of a Single Crystal Solidification Process of an Ni-based Superalloy using a CAFE Model
CAFE 모델을 사용한 니켈기 초내열합금 단결정 응고공정 해석
Jae Jun Jeong, HyungSoo Lee, Dae Won Yun, Hi Won Jeong, Young-Soo Yoo, Seong-Moon Seo, Je Hyun Lee
정재준, 이형수, 윤대원, 정희원, 유영수, 서성문, 이재현
Korean J. Met. Mater. 2023;61(2):126-136.   Published online 2023 Jan 27
DOI: https://doi.org/10.3365/KJMM.2023.61.2.126

Abstract
The efficiency of gas turbines depends on the gas turbine working temperature. Single crystal blades are being applied more often than equiaxed blades in gas turbine engines, to increase the turbine inlet temperature, resulting in enhanced turbine engine efficiency. Single crystal blades endure creep conditions at high temperature better than..... More

      
Physical Vapor Transport Process for Highly Purified Hg<sub>2</sub>Br<sub>2</sub> Crystal: from Powder Purification to Crystal Growth
Ojun Kwon, Yonghui Song, Shi-Gwan Woo, Woojin Park, Byungjin Cho
Korean J. Met. Mater. 2022;60(7):551-556.   Published online 2022 Jun 3
DOI: https://doi.org/10.3365/KJMM.2022.60.7.551

Abstract
High quality Hg2Br2 crystal grown via the physical vapor transport (PVT) process is essential for the fabrication of the acousto-optic tunable filters (AOTFs) module. The full process flow, including powder purification and crystal growth, should be systematically established, but there have been few reports about the fully established process flow..... More

                           Cited By 1
Oxidation of Ni-Cr-Co-Al-Mo-Ti-Re-Ta-W-Ru Single Crystals at 1000 <sup>o</sup>C in Air
Ni-Cr-Co-Al-Mo-Ti-Re-Ta-W-Ru 단결정의 대기중 1000 oC에서의 산화
Junhee Hahn, Xiao Xiao, Dong Bok Lee
한준희, Xiao Xiao, 이동복
Korean J. Met. Mater. 2020;58(4):234-246.   Published online 2020 Mar 11
DOI: https://doi.org/10.3365/KJMM.2020.58.4.234

Abstract
Three kinds of Ni-based single crystals with the compositions of 63.8Ni-7.5Cr-5.1Co-4.8Al-1.9Mo- 0.9Ti-3Re-11.8Ta-1.2W, 61.4Ni-7.4Cr-5Co-4.8Al-1.8Mo-0.9Ti-3.1Re-11.6Ta-4W, and 60.9Ni-7.5Cr-5Co-4.8Al- 2Mo-1Ti-2.9Re-10.9Ta-1.2W-3.8Ru, in wt%, were cast in a Bridgman furnace. In the cast alloys, Cr, Co, Re, Mo, W, and Ru became microsegregated in dendrites consisting of γ-Ni, while Ni, Ta, and Al microsegregated in interdendrites..... More

                           Cited By 3
Tin Microcrystals Synthesized by Thermal Chemical Vapor Deposition in a Hydrogen-Reducing Atmosphere
Daseul Ham, Won Jeong, Hyon Chol Kang
Korean J. Met. Mater. 2019;57(6):390-395.   Published online 2019 May 16
DOI: https://doi.org/10.3365/KJMM.2019.57.6.390

Abstract
We demonstrate a synthetic route to high-quality Sn microcrystals using thermal chemical vapor deposition (CVD) in a hydrogen-reducing atmosphere. During thermal CVD with SnO2 powder, a mixture of Ar and H2 (4%) gases was used as a carrier gas to maintain a hydrogen reduction environment. Hydrogen maintained a reduction environment..... More

                           Cited By 2
Microstructural Evolution with Solidification Rate and Heat-Treatment of Single Crystal Superalloy CMSX-4 Grown using Seed
Seed를 이용한 단결정 초내열합금 CMSX-4에서 응고속도 및 열처리에 따른 미세조직 변화
Suncheol Kwon, Jongho Shin, Geunyoung Rim, Gitae Sung, Byunggwan Yoon, Euisuk Jung, Jehyun Lee
권순철, 신종호, 임근영, 성기태, 윤병관, 정의석, 이재현
Korean J. Met. Mater. 2018;56(10):745-754.   Published online 2018 Oct 5
DOI: https://doi.org/10.3365/KJMM.2018.56.10.745

Abstract
The CMSX-4 superalloy including refractory elements was directionally solidified using the seed of a [001] single crystal to control the growth direction to [001], where solidification velocity was changed from 25 to 160 μm/s. In the log-log plot between spacing and solidification velocity, the primary dendrite arm spacing and secondary..... More

                           Cited By 2
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