Fractured Surface Morphology and Mechanical Properties of Ni-Cr Based Alloys with Mo Content for Dental Applications
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
In this study, fractured surface morphology and mechanical properties of Ni-Cr-Mo alloys with various contents of Mo for dental material use have been evaluated by mechanical test. The alloys used were Ni- 13Cr-xMo alloys with Mo contents of 4, 6, 8, and 10 wt.%, prepared by using a vacuum arc-melting furnace. Ni-13Cr-xMo alloys were used for mechanical test without heat treatment. The phase and microstructure of alloys using an X-ray diffraction (XRD) and optical microscopy (OM) were evaluated. To examine the mechanical properties of alloys according to microstructure changes, the tensile test and the hardness test were carried out using tensile tester. To understand the mechanism of Mo addition to Ni-Cr alloy on mechanical property, the morphology and fractured surfaces of alloys were investigated by field-emission scanning electron microscope (FE-SEM). As a result, 79Ni-13Cr-8Mo alloy was verified that the tensile strength and the hardness were better than others. Varying Mo content, the changes of microstructures of alloys were identified by OM and SEM and that of 79Ni-13Cr-8Mo alloy was proved fabricated well. Microstructures of alloys were changed depending on Mo content ratio. It has been observed that 8% alloy had the most suitable mechanical property for dental alloy.
Abstract
In this study, fractured surface morphology and mechanical properties of Ni-Cr-Mo alloys with various contents of Mo for dental material use have been evaluated by mechanical test. The alloys used were Ni- 13Cr-xMo alloys with Mo contents of 4, 6, 8, and 10 wt.%, prepared by using a vacuum arc-melting furnace. Ni-13Cr-xMo alloys were used for mechanical test without heat treatment. The phase and microstructure of alloys using an X-ray diffraction (XRD) and optical microscopy (OM) were evaluated. To examine the mechanical properties of alloys according to microstructure changes, the tensile test and the hardness test were carried out using tensile tester. To understand the mechanism of Mo addition to Ni-Cr alloy on mechanical property, the morphology and fractured surfaces of alloys were investigated by field-emission scanning electron microscope (FE-SEM). As a result, 79Ni-13Cr-8Mo alloy was verified that the tensile strength and the hardness were better than others. Varying Mo content, the changes of microstructures of alloys were identified by OM and SEM and that of 79Ni-13Cr-8Mo alloy was proved fabricated well. Microstructures of alloys were changed depending on Mo content ratio. It has been observed that 8% alloy had the most suitable mechanical property for dental alloy.
참고문헌 (15)
- R. P. O’connor, "Castability, opaque masking, and porcelain bonding of 17 porcelain-fused-to-metal alloys", J. Prosthet. Dent, 75, pp.367~374 (1996)
- K. F. Leinfelder, "An evaluation of casting alloys used for restorative procedures", J. Am. Dent. Ass, 128, pp.37~45 (1997)
- J. C. Wataha, "Relating nickel-induced tissue inflammation to nickel release in vivo", J Biomed Mater Res, 58, pp.537~544 (2001)
- R. M. Joias, "Shear bond strength of a ceramic to Co-Cr alloys", J Prosthet Dent, 99, pp.54~59 (2008)
- C. M. Wylie, "Corrosion of nickel-based dental casting alloys", Dent Mater, 23, pp.714~723 (2007)
- J. Qiu, "Corrosion behaviour and surface analysis of a Co-Cr and two Ni-Cr dental alloys before and after simulated porcelain firing", Eur J Oral Sci, 119, pp.93~101 (2011)
- A. El-Bediwi, "Electrochemical corrosion behavior, Vickers microhardness, and microstructure of Co–Cr and Ni–Cr dental alloys", Radiation Effects & Defects in Solids, 164, pp.712~718 (2009)
- 최답천, "도재소부용 Ni-Cr-Mo계 치과용 합금의 미세조직 및 기계적성질", 한국주조공학회지, 27(3), pp.120~125 (2007), 한국주조공학회
- J. D. Bumgardner, "Cellular response to metallic ions released from nickel-chromium dental alloys", J. Dent. Res, 74, pp.1521~1527 (1995)
- H. H. Huang, "Surface characterization of passive film on NiCr-based dental casting alloys", Biomaterials, 24, pp.1575~1582 (2003)
- F. Faot, "Microstructural characterization of Ni-Cr-Mo-Ti and Ti-6Al-4V alloys used in prosthetic abutments", Rev. odonto. ciênc, 24, pp.401~405 (2009)
- J. R. Davis, "Nickel, cobalt, and their alloys", ASM International, ~ (2000)
- A. J. Lewis, "The mechanism of tensile failure in a nickel-base casting alloy", J. Dent. Res, 56, pp.631~634 (1977)
- A. J. Lewis, "The metallography of a nickel base casting alloy", Aust Dent J, 20, pp.298~303 (1975)
- G. R. Baran, "The metallurgy of Ni-Cr alloys for fixed prosthodontics", J. Prosthet. Dent, 50, pp.639~650 (1983)