Reaction spark plasma sintering of niobium diboride

被引：43

作者：

Sairam, K. ^{[1
]}

Sonber, J. K. ^{[1
]}

Murthy, T. S. R. Ch ^{[1
]}

Subramanian, C. ^{[1
]}

Fotedar, R. K. ^{[1
]}

Hubli, R. C. ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Mat Proc Div, Bombay 400085, Maharashtra, India

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2014年 / 43卷

关键词：

Niobium diboride; Spark plasma sintering; Reaction sintering; Joules heating; Mechanical properties; Microstructure; NBB2; GROWTH;

D O I：

10.1016/j.ijrmhm.2013.12.011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Niobium diboride (NbB2) is synthesized and consolidated by the spark plasma sintering technique. Elemental reactants such as niobium (Nb) and boron (B) were subjected to two stage heat treatment, initially at 1200 degrees C for synthesis and followed by densification at the temperatures in the range of 1700 degrees C to 1900 degrees C. High dense NbB2 (similar to 97.7%rho(th)) is obtained at 1900 degrees C after 15 min holding period. Load application during heat treatment stage is found to improve the sinterability of the niobium diboride compacts. Hardness, elastic modulus and indentation fracture toughness of the high dense NbB2 are measured as 20.25 GPa, 539 GPa and 4 MPa m(1/2) respectively. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：259 / 262

页数：4

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