热压超高温HfB2和HfB2 - sic陶瓷烧蚀试验

IF 1.2 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Superhard Materials Pub Date : 2025-09-04 DOI:10.3103/S1063457625040082

T. O. Prikhna, H. Ünsal, P. P. Barvitskyi, V. E. Moshchil

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引用次数: 0

摘要

超高温烧蚀测试HfB2和HfB2-SiC热压陶瓷样品在空气中加热下的火焰燃烧器美联储O2 /乙炔混合在13毫米的距离样品表面已经证明HfB2与30 wt %的碳化硅陶瓷添加剂的晶粒尺寸30 - 50和5 - 10µm和0.25毫克/ s的质量损失更稳定(2066 - 2080°C)与精细HfB2陶瓷开裂温度达到1870°C。所有材料的断裂韧性值基本相当，HfB2-SiC复合材料的硬度略高。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Ablation Tests of Hot-Pressed Ultrahigh-Temperature HfB2 and HfB2–SiC Ceramic

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Ablation Tests of Hot-Pressed Ultrahigh-Temperature HfB2 and HfB2–SiC Ceramic

Ablation tests of ultrahigh-temperature HfB₂ and HfB₂–SiC based hot-pressed ceramic samples in the air under heating in the flame of a burner fed with a O₂/C₂H₂ mixture at a distance of 13 mm to the surface of a sample have demonstrated that HfB₂ ceramic with 30 wt % of SiC additive with a grain size of 30–50 and 5–10 µm and a mass loss of 0.25 mg/s is much more stable (up to 2066–2080°C) as compared to additive-free HfB₂ ceramic cracking at a temperature of 1870°C. Fracture toughness values are comparable for all the studied materials, and the hardness of HfB₂–SiC composites is slightly higher.

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来源期刊

Journal of Superhard Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

1.80

自引率

66.70%

发文量

审稿时长

2 months

期刊介绍： Journal of Superhard Materials presents up-to-date results of basic and applied research on production, properties, and applications of superhard materials and related tools. It publishes the results of fundamental research on physicochemical processes of forming and growth of single-crystal, polycrystalline, and dispersed materials, diamond and diamond-like films; developments of methods for spontaneous and controlled synthesis of superhard materials and methods for static, explosive and epitaxial synthesis. The focus of the journal is large single crystals of synthetic diamonds; elite grinding powders and micron powders of synthetic diamonds and cubic boron nitride; polycrystalline and composite superhard materials based on diamond and cubic boron nitride; diamond and carbide tools for highly efficient metal-working, boring, stone-working, coal mining and geological exploration; articles of ceramic; polishing pastes for high-precision optics; precision lathes for diamond turning; technologies of precise machining of metals, glass, and ceramics. The journal covers all fundamental and technological aspects of synthesis, characterization, properties, devices and applications of these materials. The journal welcomes manuscripts from all countries in the English language.