Reaction spark plasma sintering of niobium diboride

K. Sairam; J.K. Sonber; T.S.R.Ch Murthy; C. Subramanian; R.K. Fotedar; R.C. Hubli

doi:10.1016/j.ijrmhm.2013.12.011

Reaction spark plasma sintering of niobium diboride

K. Sairam, J.K. Sonber, T.S.R.Ch Murthy, C. Subramanian, R.K. Fotedar, R.C. Hubli

Metallurgy and Materials

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

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 °C for synthesis and followed by densification at the temperatures in the range of 1700 °C to 1900 °C. High dense NbB2 (~ 97.7%ρth) is obtained at 1900 °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 m1/2 respectively.

Original language	English
Pages (from-to)	259-262
Number of pages	4
Journal	International Journal of Refractory Metals and Hard Materials
Volume	43
Early online date	29 Dec 2013
DOIs	https://doi.org/10.1016/j.ijrmhm.2013.12.011
Publication status	Published - Mar 2014

Keywords

Niobium diboride
Spark plasma sintering
Reaction sintering
Joules heating
Mechanical properties
Microstructure

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https://doi.org/10.1016/j.ijrmhm.2013.12.011Licence: None: All rights reserved

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title = "Reaction spark plasma sintering of niobium diboride",

abstract = "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 °C for synthesis and followed by densification at the temperatures in the range of 1700 °C to 1900 °C. High dense NbB2 (~ 97.7%ρth) is obtained at 1900 °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 m1/2 respectively.",

keywords = "Niobium diboride, Spark plasma sintering, Reaction sintering, Joules heating, Mechanical properties, Microstructure",

author = "K. Sairam and J.K. Sonber and T.S.R.Ch Murthy and C. Subramanian and R.K. Fotedar and R.C. Hubli",

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AU - Sairam, K.

AU - Sonber, J.K.

AU - Murthy, T.S.R.Ch

AU - Subramanian, C.

AU - Fotedar, R.K.

AU - Hubli, R.C.

PY - 2014/3

Y1 - 2014/3

N2 - 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 °C for synthesis and followed by densification at the temperatures in the range of 1700 °C to 1900 °C. High dense NbB2 (~ 97.7%ρth) is obtained at 1900 °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 m1/2 respectively.

AB - 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 °C for synthesis and followed by densification at the temperatures in the range of 1700 °C to 1900 °C. High dense NbB2 (~ 97.7%ρth) is obtained at 1900 °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 m1/2 respectively.

KW - Niobium diboride

KW - Spark plasma sintering

KW - Reaction sintering

KW - Joules heating

KW - Mechanical properties

KW - Microstructure

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DO - 10.1016/j.ijrmhm.2013.12.011

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SP - 259

EP - 262

JO - International Journal of Refractory Metals and Hard Materials

JF - International Journal of Refractory Metals and Hard Materials

ER -

Reaction spark plasma sintering of niobium diboride

Abstract

Keywords

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