材料科学
热压
热扩散率
陶瓷
制作
维氏硬度试验
复合材料
缩进
断裂韧性
热导率
分析化学(期刊)
烧结
冶金
微观结构
物理
病理
化学
医学
替代医学
量子力学
色谱法
作者
Yasith Chameendra Jayakody Mudiyanselage,Karthikeyan Ramachandran,Daniel Doni Jayaseelan
标识
DOI:10.1080/17436753.2022.2139448
摘要
ZrSi2 was fabricated via reactive hot-pressing technique for 45 min at 1250°C and 1350°C, respectively. The hot-pressed sample exhibited Vickers hardness of 10.93 ± 0.32 GPa and indentation fracture toughness of 3.16 ± 0.54 MPa.m1/2. Thermal conductivity (RT-2.99 W (m.K)−1) and diffusivity (RT–18.2 mm2 s−1) of the sample decreased with increasing temperature due to phonon scattering. Oxidation studies were carried out for the hot-pressed samples from 1000°C to 1200°C for 5, 48 and 100 h in air. The oxidation test results showed that ZrSi2 followed selective oxidation with Si diffusing into the oxide layers at high temperatures. At 1200°C, the surface of ZrSi2 oxidised completely to form a high-temperature stable phase, zircon (ZrSiO4). The autoclave test at 250°C and 250 bar shown negligible mass gain (∼0.022 g) which suggests the usage of ZrSi2 for nuclear fuel cladding applications.
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