Nano-structured alumina reinforced with NbC

被引：6

作者：

Acchar, Wilson ^{[1
]}

Cairo, Carlos Alberto A. ^{[2
]}

Chiberio, Paulo ^{[1
]}

机构：

[1] Univ Fed Rio Grande do Norte, Postgrad Program Sci & Mat Engn, BR-59072970 Natal, RN, Brazil

[2] IAE, Ctr Tecn Aeroespacial, Div Mat, Sao Jose Dos Campos, SP, Brazil

来源：

COMPOSITE STRUCTURES | 2019年 / 225卷

关键词：

Nno-alumina; Niobium carbide; Tungsten carbide; Mechanical properties; MECHANICAL-PROPERTIES; MICROSTRUCTURE; COMPOSITE; NANOCOMPOSITES; DENSIFICATION;

D O I：

10.1016/j.compstruct.2019.111109

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The incorporation of refractory hard particles in alumina-based composites may inhibit grain growth of the matrix, contributing significantly to improve the mechanical properties of the composite. Al2O3-NbC nano-composites were uniaxially hot-pressed at 1500 degrees C in an inert atmosphere and their mechanical properties and microstructures were analyzed. Sintered density, microhardness, crystalline phases and mechanical performance were evaluated. X-ray diffraction pattern revealed the presence of Alumina and NbC. No oxidation products were present after the sintering process. Alumina-NbC composite material showed mechanical properties comparable to other alumina-carbide systems. Larger NbC-particles showed to be not effective as grain growth barrier to nano-alumina.

引用

页数：3

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