1 / 10

ISOL_HT: Thermal and Mechanical Properties of Materials at High Temperature:

ISOL_HT: Thermal and Mechanical Properties of Materials at High Temperature: Experimental set-up development and measurements. A Letter Of Intent for FP7 European Program (EURONS). A. Andrighetto and G. Prete, LNL-INFN, Italy.

leah-mcclain
Download Presentation

ISOL_HT: Thermal and Mechanical Properties of Materials at High Temperature:

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ISOL_HT: Thermal and Mechanical Properties of Materials at High Temperature: Experimental set-up development and measurements A Letter Of Intent for FP7 European Program (EURONS) A. Andrighetto and G. Prete, LNL-INFN, Italy Joint EURISOL-EURONS Town Meeting: Helsinki, Finland September 17 19,2007

  2. The Project Group • List of Participants and expertise • INFN • LNL (A. Andrighetto), LNS (G. Cuttone) • ISOL targets design • Padova University • Engineering Department (Materials development) – (P. Colombo) • Study of advanced ceramic materials • Engineering Department (Mechanical design) – (G. Meneghetti) • Structural design and FEM analysis • Chemical Department - Italy (P. Di Bernardo) • Nuclear chemistry and UCx preparation • ENEA (Italian agency for energy), Bologna-Faenza - (S. Cevolani) • Thermal and mechanical analysis, thermal test Laboratory • CERN, Switzerland (J.Lettry, T. Stora) • IPN- Orsay, France (C. Lau) • ORNL, USA (D. Stracener) List of Associate Partners: SPES Target Group 2007

  3. What are Mechanical and Thermal Properties? • Main Mechanical Properties: • Young Modulus E • Poisson Ratio n • Compression Strength: e = f (s, E) • Flexural Strength • Creep Resistance: e =f (s, T, t) Brittle Fracture = Ee e= deformation s= stress • Thermal Properties • Emissivity • Thermal Conductivity • Specific Heat • Linear Expansion Coefficient Linear Expansion Coefficient Thermal conductivity Materials are mainly characterised at room temperature SPES Target Group 2007

  4. XRD What are These Properties Due To? Micro-structure and production method of the material Intergranular Fracture in Bulk Ceramic Example of Lanthanum Carbide Phases Detection • Material: • Composition • Phase assemblage • Morphology (bulk, porous) • Grain Size • Grain Alignment (anisotropy) • Boundary Chemistry • Density New phase detected Cellular Ceramic Example of Anisotropy • Production Method: • Temperature • Pressure • Time SPES Target Group 2007

  5. RIB’s Physics: ISOL Target Many Isol Facility in the word: Main Requirement: Working at very High Temperature The Isol Target is stressed ! : Beam Pulse; T gradients; radiation level ... Several target materials are employed in ISOL Based Facilities: New materials are under development. How to compare them?? SPES Target Group 2007

  6. Tantalum Heater Beam 1012÷1013 fissions/s s=1.3 mm, Φ= 40 mm The Direct Target is a Very Critical Issue Design of the SPES Direct Target. Beam power deposition in UCx : 8KW UCx Disks T Distribuition Tmax= 2430 °C Thermal and Mechanical Calculations HRIBF test experiment SiC target Scaled prototype

  7. R&D of the Experimental Set-Up for Emissivity Measurements Emissivity vs T Dual frequencies pyrometer Done at LNL ! Work in Progress at LNL • Emissivity up to 2000 °C • Other Measurements @T= 2000 °C: • Thermal Conductivity. • Thermal Expansion Coefficient • Thermal Shock resistance. • Young’s Modulus, Compression and Bending Strength. • Creep Resistance SPES Target Group 2007

  8. DT = 150 °C The Direct Target is a Very Critical Issue Mechanical Calculations UCx Disks Stress Distribuition beam Last disk Fracture stress is given up to ~1300 °C only, where it is σ ≈ 200 MPa. What is the behavior at higher temperature?

  9. Why are They Important? • Many fields are interested in very harsh conditions employment of materials: • Mechanical Components, Aerospace Industry, Nuclear Reactors, Particles Accelerators (SNS), Fusion Physics (ITER), RIB Physics • A lack of data for mechanical and thermal parameters is present mainly at high temperature (≥ 2000 °C) • There is lack of an Experimental Set-up able to measure Mechanical and Thermal Properties under these conditions -> A dedicate Data Bank is required ! • Calculation of Risk • Designing and calculations (FEM analysis) • Deeper Knowledge and Improvement of Properties of Materials • Opening New Fields of Investigation SPES Target Group 2007

  10. R&D of the Experimental Set-Up for Mechanical Properties Optimization of ISOL target material from the mechanical, thermal and release point of view 4-Points Bending Scheme Design of the Experimental Set-Up Thermal and Mechanical Properties Characterization of Materials at High T is of great interest for ISOL based facilities, and other advanced applications Experimental work: perform measurements ofMain Mechanical Properties Compression Strength Flexural Strength Young Modulus E Tmax ≥ 2000 °C P= 10-6 mbar SPES Target Group 2007

More Related