Materials Today Communications
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2024
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IF 3.7
Yilong Duan,Guichun He,Zhangsong Jiang,Yan Shi,Yinmei Jiang,Yujie Zhang,Jiahui Wu
The use of tailings for the preparation of ceramic foams is considered a safe and effective method for disposing of them. However, it is unclear whether wolframite tailings (WT) and scheelite tailings (ST) can synergistically be used to prepare ceramic foams, and the foaming process remains unclear. This study investigated the properties of ceramic foams prepared from these tungsten tailings at different ST contents, calcination temperatures, holding times, and SiC additions. The study found that the ceramic foams exhibited appropriate properties when the ratio of WT to ST was 6.5:3.5, with a bulk density of 0.823 g/cm 3 , a compressive strength of 1.557 MPa, an apparent porosity of 48.433 %, and a water absorption ratio of 58.477 %, which is expected to be used as a new type of material to replace the traditional material. Furthermore, changes in calcination temperature, holding time, and SiC addition significantly affected the properties. As these variables increased, the bulk density and compressive strength of ceramic foams gradually decreased, while the apparent porosity and water absorption ratio initially increased before subsequently decreasing. Further analysis indicated that the samples underwent oxidation reactions prior to the decomposition of CaCO 3 and CaF 2 . These findings offered valuable insights into the comprehensive utilization of tungsten tailings and the low-cost preparation of ceramic foams for industrial applications.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE FORUM
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2019
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IF 0
Ke Jia Kang,Peng Fan,Jian Zhang,Qiang Guo Luo,Qiang Shen,Lian Meng Zhang
In this study, the W-Si-C multi-phase composites were fabricated by an arc melting method. With addition of SiC, the grain size of W is obviously reduced, and the small angle misorientation becomes dominate, which is beneficial for the improvement of deformability. The effects of SiC additions (from 0.5 to 3wt%) on the microstructure and mechanical properties are mainly investigated. With 1 wt% SiC addition, the flexural strength reaches the highest value. The self-generation of W5Si3 may enhance the strength and ductility, but too much W5Si3 exists as brittle BP (Brittle to Plastic) microstructure. The highest flexural strength is obtained at approximately 1 vol% W5Si3.
研究领域:
材料科学
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机械工程
✓ 已验证
DOI
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
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2018
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IF 2.606
Kejia Kang,Rong Tu,Guoqiang Luo,Jian Zhang,Jiawen Zhu,Qiang Shen,Lianmeng Zhang
In this research, the high-temperature mechanical, electrical and thermal properties of arc-melted W-based composites with a small amount of SiC additives were investigated. The high-temperature mechanical properties of tungsten were enhanced by the presence of the hard ceramic phase (W 5 Si 3 and W 2 C) and the interaction of dislocations. The ceramic phase also played a role in inhibiting the grain growth at high temperatures. The ultimate compressive strength (UCS) of the W with 1 wt% SiC (S1) was 968.9 MPa at 1273 K, which is three times that of pure W (291.9 MPa) at 1273 K, showing a significant enhancement in high-temperature strength . Both thermal conductivity ( κ ) and electrical conductivity ( σ ) decreased with the increasing of SiC addition. With increasing temperature, the σ decreased while the κ increased due to the intrinsic behavior of the ceramic phase in the composites.
研究领域:
材料科学
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工程学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2022
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IF 6.364
Qingyi Kong,Sijia Huo,Lei Chen,Yujin Wang,Jiahu Ouyang,Yu Zhou
Fully dense (Zr, Ti)B 2 -(Zr, Ti)C-SiC ceramics were prepared by reactive hot-pressing using ZrB 2 , TiC, and SiC as the initial materials for the first time. Effects of SiC addition on the microstructure evolution and mechanical properties were reported. The in-situ reaction between ZrB 2 and TiC as well as the SiC addition leads to the grain refinement. Besides, elongated (Zr, Ti)B 2 plate-like grains are obtained due to the occurrence of a transient liquid phase, which leads to the crack deflection in the matrix effectively. Mechanical properties are improved significantly due to grain-refinement and solid solution strengthening, and plate-like grains toughening effects. The ZrB 2 -10 mol%TiC composite with 10 mol% SiC additional exhibits good comprehensive mechanical properties of the hardness of 20.2 GPa, the flexural strength of 803 MPa, and the fracture toughness of 5.7 MPa m 1/2 .
研究领域:
材料科学
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陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）