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Ablation Rate

The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform

Ruimei Yuan – 1st expert on this subject based on the ideXlab platform

  • Ablation resistance of hfb2 sic coating prepared by in situ reaction method for sic coated c c composites
    Ceramics International, 2017
    Co-Authors: Peipei Wang, Hejun Li, Yulei Zhang, Ruimei Yuan

    Abstract:

    Abstract To improve the Ablation resistance of SiC coating, HfB 2 -SiC coating was prepared on SiC-coated carbon/carbon (C/C) composites by in-situ reaction method. Owing to the penetration of coating powders, there is no clear boundary between SiC coating and HfB 2 -SiC coating. After oxyacetylene Ablation for 60 s at heat flux of 2400 kW/m 2 , the mass Ablation Rate and linear Ablation Rate of the coated C/C composites were only 0.147 mg/s and 0.267 µm/s, reduced by 21.8% and 60.0%, respectively, compared with SiC coated C/C composites. The good Ablation resistance was attributed to the formation of multiple Hf-Si-O glassy layer including SiO 2 , HfO 2 and HfSiO 4 .

E Audouard – 2nd expert on this subject based on the ideXlab platform

  • femtosecond laser volume Ablation Rate and threshold measurements by differential weighing
    Optics Express, 2012
    Co-Authors: David Pietroy, Y Di Maio, B Moine, E Baubeau, E Audouard

    Abstract:

    Precise weight measurements of stainless steel, PZT and PMMA samples were performed after groove machining with femtosecond laser pulses (150 fs, 800 nm, 5 kHz) to determine volume Ablation Rates and Ablation threshold with good accuracy. Weighing clearly enables faster determination of such phenomenological parameters without any methodological issue compared to other methods. Comparisons of the three types of materials reveal similar monotonous trends depending on peak fluences from 0.2 to 15 J/cm2. The metallic target exhibits both the lowest volume Ablation Rate under the highest irradiation conditions with almost 400 µm3/pulse and the lowest Ablation threshold with 0.13 J/cm2. Ceramic PZT reaches 3.103 µm3/pulse with a threshold fluence of 0.26 J/cm2 while polymer PMMA attains 104 µm3/pulse for a 0.76 J/cm2 threshold. Pros and cons of this method are also deduced from complementary results obtained on microscopic and confocal characterizations.

Peipei Wang – 3rd expert on this subject based on the ideXlab platform

  • Ablation resistance of hfb2 sic coating prepared by in situ reaction method for sic coated c c composites
    Ceramics International, 2017
    Co-Authors: Peipei Wang, Hejun Li, Yulei Zhang, Ruimei Yuan

    Abstract:

    Abstract To improve the Ablation resistance of SiC coating, HfB 2 -SiC coating was prepared on SiC-coated carbon/carbon (C/C) composites by in-situ reaction method. Owing to the penetration of coating powders, there is no clear boundary between SiC coating and HfB 2 -SiC coating. After oxyacetylene Ablation for 60 s at heat flux of 2400 kW/m 2 , the mass Ablation Rate and linear Ablation Rate of the coated C/C composites were only 0.147 mg/s and 0.267 µm/s, reduced by 21.8% and 60.0%, respectively, compared with SiC coated C/C composites. The good Ablation resistance was attributed to the formation of multiple Hf-Si-O glassy layer including SiO 2 , HfO 2 and HfSiO 4 .