期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 37, 期 15, 页码 4793-4799出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2017.05.055
关键词
Whisker; Reinforce; Phosphates; Dielectric; Toughness
资金
- Foundation of Sichuan Educational Committee of China [13ZB0117, 16ZB0316]
- Scientific Research Initiation Funds of Mianyang Normal University of China [QD2015A006]
In-situ mullite whisker reinforced aluminum chromium phosphate wave-transparent ceramics were designed and prepared. The phase transformation, microstructure, mechanical and electrical properties of the ceramics were investigated, and the mechanisms of in-situ growth and toughening were discussed. Results indicated that the in-situ growth of mullite whisker significantly improved the mechanical properties of the matrix, especially the high temperature flexural strength. The room temperature flexural strength, 1000 degrees C flexural strength and fracture toughness of the ceramics were 135.60 MPa, 121.71 MPa and 4.52 MPa m(1/2). After sintering at 1500 degrees C, the optimum properties of tan delta and microwave transmittance at region 8-12 GHz were <3.6, <0.03 and>80%, respectively. The sinterability of ACP matrix was improved by the in-situ process of high mullization above 1450 degrees C. Using ACP binder as the raw material can avoid the phase transformation from B-AlPO4 to T-AlPO4. The synthesized mullite whiskers played a role in toughening by whiskers fracture, crack deflection and whisker pulling out. (C) 2017 Elsevier Ltd. All rights reserved.
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