نتایج جستجو برای: zr alloy
تعداد نتایج: 60554 فیلتر نتایج به سال:
Titanium (Ti) has been used for long in dentistry and medicine for implant purpose. During the years, not only the commercially pure Ti but also some alloys such as binary and tertiary Ti alloys were used. The aim of this review is to describe and compare the current literature on binary Ti alloys, including Ti-Zr, Ti-In, Ti-Ag, Ti-Cu, Ti-Au, Ti-Pd, Ti-Nb, Ti-Mn, Ti-Mo, Ti-Cr, Ti-Co, Ti-Sn, Ti-...
R.Grimberg , M.L.Craus , A.Savin , R.Steigmann , M.Ruch 3 1 National Institute of Research and Development for Technical Physics, Iasi, Romania 2 Joint Institute for Nuclear Research, Dubna, Russia 3 CNEA, Buenos Aires, Argentina Abstract Zr 2.5%Nb alloys have wide utilization in nuclear energy engineering, being used at the fabrication of pressure tubes from Pressurized Heavy Water Reactors (P...
The synthesis and characterization of Ti40Zr20Hf20Fe20 (atom %) alloy, in the form of rods (f = 2 mm), prepared by arc-melting, and subsequent Cu mold suction casting, is presented. The microstructure, mechanical and corrosion properties, as well as in vitro biocompatibility of this alloy, are investigated. This material consists of a mixture of several nanocrystalline phases. It exhibits excel...
The purpose of this study was to evaluate mechanical properties, surface characteristics and castability of Zr-14Nb dental castings. The mean 0.2% proof and ultimate tensile strengths of Zr-14Nb were approximately 68% and 76% those of Ti-6Al-7Nb, respectively, while they were comparable to Co-29Cr-6Mo. Elongation of Zr-14Nb was the highest of all alloys tested. The hardened reaction layer was f...
Porous carbonaceous preforms, made from graphite and silicon carbide (SiC) powders, with varying powder mass fractions particle sizes, were infiltrated at 1500 °C 1700 by Si-8 at. pct Zr alloy to produce dense Si-Zr-SiC composites. The experiments performed in a chamber vacuum furnace 10−2 mbar. most desirable results obtained for preforms composed of mixture SiC containing 15–20 % fraction °C....
A metallurgical zirconium nitride (ZrN) layer was fabricated using glow metallurgy using nitriding with zirconiuming prior treatment of the Ti6Al4V alloy. The microstructure, composition and microhardness of the corresponding layer were studied. The influence of this treatment on fretting wear (FW) and fretting fatigue (FF) behavior of the Ti6Al4V alloy was studied. The composite layer consiste...
In order to refine the microstructure and improve performance of direct energy deposited (DED) additively manufactured Al–Mg–Sc–Zr alloy, TiC-modified composites were prepared by DED effect TiC content on was studied. absence particle, alloy consisted fine grains with average size 8.36 μm, well-dispersed nano-Al3(Sc,Zr) particles inside Mg2Si phase along grain boundaries. With addition 1 wt% Ti...
The influence of Zr additions (in the form ZrH2 particles) on microstructure and mechanical properties IN718 Ni-based superalloy manufactured by selective laser melting was explored. Fully dense alloys could be obtained careful selection processing parameters. addition did not modify alloy but introduced a dispersion Zr-rich globular particles approximately 50 nm in diameter which increased str...
Zirconium (Zr) alloy is a promising fuel cladding material used widely in nuclear reactors. Usually, it service for long time under the effects of neutron radiation with high temperature and pressure, which results thermomechanical coupling behavior during process. Focusing on UO2/Zr elements, macroscopic responses pure Zr, Zr-Sn, Zr-Nb binary system alloys, as well Zr-Sn-Nb ternary materials, ...
Abstract Al-Cu-Ag-Fe-Mg-Zr-Er alloy with different content of Er addition was prepared by using metallurgy processing. The Al-4.5%Cu-0.5%Ag-0.35%Fe-0.38%Mg-0.1%Zr-xEr phase and its refinement mechanism were studied SEM. Tensile fatigue tests performed for the in state deformation treatment condition. microstructural observations reveal that 0.2% rare earth can effectively refine grain structure...
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