Effect of boron addition on microstructure, mechanical properties and oxidation resistance of TaC ceramics
Effect of boron addition on microstructure, mechanical properties and oxidation resistance of TaC ceramics
复制标题
硼添加对TaC陶瓷微观结构、力学性能及抗氧化性能的影响
DOI：
10.1016/j.ceramint.2018.12.160
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发表时间：
2019-04
影响因子：
5.2
通讯作者：
Wang Yujin
中科院分区：
文献类型：
--
作者：
Lu Zhuang;Liu Limeng;Geng Guihong;Laptev Alex;er M;Hou Zhaoping;Wang Yujin
通过在2100 °C和40 MPa下热压1h制备了添加0.03- 0.60wt%硼的TaC陶瓷。研究了硼含量对TaC陶瓷的致密化、相组成、显微结构、力学性能和抗氧化性能的影响。当硼含量为0.12重量%以上时，由于在TaC存在下硼与氧杂质之间的反应而获得全密度。在0.24和0.60重量% B组合物中，在气出氧杂质之后形成TaB 2和C的次要相。随着硼含量的增加，TaC陶瓷的显微组织得到细化。具有0.24重量%的硼的TaC陶瓷表现出最好的机械性能与维氏硬度，弯曲强度和断裂韧性为17.7 GPa，534 MPa和4.6 MPa m1/2，分别。当加入更多的硼时，TaC晶粒的界面结合得到加强，导致断裂韧性降低。TaC陶瓷的抗氧化性随着硼含量的增加而增加。特别地，0.60重量% B组合物在800 ℃下在空气中氧化3小时后显示出0.0018 g/cm 2的增重。
TaC ceramics with 0.03–0.60 wt% of boron additions were prepared by hot pressing at 2100 °C for 1 h under a pressure of 40 MPa. Effects of boron content on densification, phase composition, microstructure, mechanical properties and oxidation resistance of the TaC ceramics were investigated. When the boron content was 0.12 wt% and above, full density was obtained due to reactions between boron and oxygen impurity at presence of TaC. Minor phases of TaB2and C were formed in the 0.24 and 0.60 wt% B compositions after gas-out of the oxygen impurity. Microstructure of the TaC ceramics was refined with increasing in boron content. The TaC ceramic with 0.24 wt% of boron showed the best mechanical properties with a Vickers hardness, flexural strength and fracture toughness of 17.7 GPa, 534 MPa and 4.6 MPa m1/2, respectively. When more boron was added, interfacial bonding of the TaC grains was strengthened causing a decrease in fracture toughness. Oxidation resistance of the TaC ceramics increased with boron content. Particularly, the 0.60 wt% B composition showed a weight gain of 0.0018 g/cm2after oxidization at 800 °C in air for 3 h.
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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
影响因子：
6
作者：
Zhonghong Lai;Feng Ye;Zhiguo Zhang;Yu Zhou
通讯作者：
Yu Zhou
显微组织%20and%20机械%20性能%20of%20TaC%20陶瓷%20with%201-7.5%20mol%%20Si%20as%20烧结%20aid
影响因子：
3.9
作者：
Geng Guihong;Liu Limeng;Wang Yujin;Hai Wanxiu;Sun Wenzhou;Chen Yuhong;Wu Laner
通讯作者：
Wu Laner
DOI：
10.1016/j.jeurceramsoc.2010.01.032
发表时间：
2010-08-01
影响因子：
5.7
作者：
Talmy, I. G.;Zaykoski, J. A.;Opeka, M. M.
通讯作者：
Opeka, M. M.
影响因子：
9.4
作者：
X. Zhang;Qing Yang;L. Jonghe
通讯作者：
X. Zhang;Qing Yang;L. Jonghe
影响因子：
5.7
作者：
L. Silvestroni;D. Sciti
通讯作者：
L. Silvestroni;D. Sciti