Densification of tantalum carbide ceramics with 5 mol.% Al, Cu, Ag and Au

Densification of tantalum carbide ceramics with 5 mol.% Al, Cu, Ag and Au
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致密化%20of%20钽%20碳化物%20陶瓷%20with%205%20mol.%%20Al,%20Cu,%20Ag%20and%20Au

DOI:
10.1016/j.scriptamat.2013.06.024
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发表时间:
2013-10
期刊:
影响因子:
6
通讯作者:
Yu Zhou
Yu Zhou
中科院分区:
材料科学1区
文献类型:
--
作者:
Zhonghong Lai;Feng Ye;Zhiguo Zhang;Yu Zhou

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研究了添加5%的铝、铜、银或金对TaC陶瓷的致密化、显微结构、力学性能和抗稀气氧化性能的影响。添加Au的情况下,在1700℃的放电等离子烧结后,在30℃的压力下烧结5分钟,可以获得完全的致密度和较高的抗折强度(可达738 Mpa)。由于TaC颗粒被一层薄的金属薄膜润湿,使固结材料具有更好的抗稀薄空气氧化性能。
The effects of the addition of 5 mol.% aluminum, copper, silver or gold on the densification, microstructures, mechanical properties and oxidation resistance in thin air of TaC ceramics were investigated. Full density and relatively high flexural strength (up to 738 MPa) were observed in the case of the Au addition after spark plasma sintering at 1700 °C for 5 min under 30 MPa pressure. Due to wetting of the TaC grains by a thin metallic film, the consolidated materials showed enhanced oxidation resistance against thin air.
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