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Mechanical Strength And Fracture Toughness Comparison Of Silicon And Y2O3 Materials.pdf

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Preview of Mechanical Strength and Fracture Toughness Comparison of Silicon and Y2O3 Materials
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📊 Size: 2.35 MB
📄 Pages: 9 pages
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Summary

The article compares the mechanical properties of n-type silicon single crystal (<100> orientation, 2000 Ωcm resistivity) and Y2o3 ceramics at both room temperature and elevated temperatures (700°C for Si, 800°C for Y2o3). Key findings include:

- Room Temperature:
- Silicon single crystal: Fracture toughness (KIc) = 1.3 ± 0.1 MPam1/2, four-point bending strength (σc) = 289 ± 61 MPa.
- Y2o3 ceramics: KIc = 1.8 ± 0.2 MPam1/2, σc = 184 ± 20 MPa.

- Elevated Temperatures:
- Silicon single crystal at 700°C: KIc = 20 ± 3 MPam1/2, σc = 592 ± 86 MPa.
- Y2o3 ceramics at 800°C: KIc = 1.7 ± 0.1 MPam1/2, σc = 230 ± 23 MPa.

- Conclusion: At elevated temperatures, both fracture toughness and bending strength of the silicon single crystal are significantly greater than those of Y2o3 ceramics, making Si a more robust choice for certain applications.

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Description

The article compares the mechanical strength and fracture toughness of a n-type silicon single crystal (<100> orientation) with Y2O3 ceramics, both suitable for optical windows in the near infrared range, highlighting temperature-dependent properties. At room temperature, Si exhibits KIc = 1.3 ± 0.1 MPa·m¹/², while Y2O3 ceramics show higher values at elevated temperatures.

Technical Information

  • File Format: PDF
  • File Size: 2.35 MB
  • Pages: 9
  • Language: EN
  • Total Downloads: 24
  • Last Updated: 2 months ago

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