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dc.contributor.author김영도-
dc.date.accessioned2019-11-26T04:52:33Z-
dc.date.available2019-11-26T04:52:33Z-
dc.date.issued2017-06-
dc.identifier.citationINTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, v. 65, page. 14-18en_US
dc.identifier.issn0263-4368-
dc.identifier.urihttps://www.sciencedirect.com/science/article/abs/pii/S0263436816303791?via%3Dihub-
dc.identifier.urihttps://repository.hanyang.ac.kr/handle/20.500.11754/114544-
dc.description.abstractMo-Si-B alloys composed of two intermetallic compound phases (Mo5SiB2 and Mo3Si) and a molybdenum solid solution matrix phase have been investigated for use as high-temperature structural materials due to their high melting point and good creep resistance. However, despite these advantages, Mo-Si-B alloys are difficult to use in practical applications because they have insufficient fracture toughness at room temperature. So, in many researches, microstructure control and the addition of other elements in the alpha-Mo matrix phase are conducted as an effective way to improve the fracture toughness.In this study, niobium (Nb) was added to a Mo-Si-B alloy by a powder metallurgical method to improve the mechanical properties. First, the Mo and Nb powders were pulverized by high-energy ball milling. Then, the synthesized intermetallic compound powders, which were fabricated by continuous heat treatment under a H-2 atmosphere, were mixed with ball-milled Mo and Nb powder. Pressureless sintering was conducted at 1400 degrees C for 3 h under a H-2 atmosphere. The Vickers hardness and fracture toughness were measured to investigate the mechanical properties of the sintered Mo-Si-B and Mo-Nb-Si-B alloy. The Vickers hardness was about 425 Hv for a Mo-Nb-Si-B alloy, which was lower value of 165 Hv compared to Mo-Si-B alloy (590 Hv). On the other hand, the fracture toughness of the Mo-Nb-Si-B alloy (14.5 MPa center dot root m) greatly increased compared to that of the Mo-Si-B alloy (12.6 MPa center dot root m). (C) 2016 Elsevier Ltd. All rights reserved.en_US
dc.description.sponsorshipThis research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2016R1A6A1A03013422). And this research was also supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2015R1D1A1A01057689).en_US
dc.language.isoen_USen_US
dc.publisherELSEVIER SCI LTDen_US
dc.subjectMo-Si-B alloyen_US
dc.subjectNiobiumen_US
dc.subjectPressureless sinteringen_US
dc.subjectVickers hardnessen_US
dc.subjectFracture toughnessen_US
dc.titleMechanical properties of Mo-Nb-Si-B quaternary alloy fabricated by powder metallurgical methoden_US
dc.typeArticleen_US
dc.relation.volume65-
dc.identifier.doi10.1016/j.ijrmhm.2016.10.008-
dc.relation.page14-18-
dc.relation.journalINTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS-
dc.contributor.googleauthorByun, Jong Min-
dc.contributor.googleauthorBang, Su-Ryong-
dc.contributor.googleauthorKim, Se Hoon-
dc.contributor.googleauthorChoi, Won June-
dc.contributor.googleauthorKim, Young Do-
dc.relation.code2017008564-
dc.sector.campusS-
dc.sector.daehakCOLLEGE OF ENGINEERING[S]-
dc.sector.departmentDIVISION OF MATERIALS SCIENCE AND ENGINEERING-
dc.identifier.pidydkim1-
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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