Development of V-free porous Ti-A356-Nb alloy by liquid sintering of compacted powders and its oxidation behaviour

A. S. Bolokang; D. E. Motaung; C. J. Arendse

doi:10.1016/j.matpr.2020.03.829

Development of V-free porous Ti-A356-Nb alloy by liquid sintering of compacted powders and its oxidation behaviour

A. S. Bolokang
, D. E. Motaung
, C. J. Arendse

Research output: Contribution to journal › Conference article › peer-review

Abstract

Porous Ti-Al-Si-Nb alloy was developed through a mixture of Ti, A356 Al alloy and Nb powders followed by compaction and sintering. The sintered Ti-Al-Si-Nb alloy was comprised of the a and b-phases after sintering. The Nb content was predominately found in the b-phase. XRD technique has detected the FCC phase (5.750 Å), the HCP (5.140 Å; c = 9.480 Å) and tetragonal Ti₃Al (4.585 Å; c = 2.960 Å) phases. Upon cyclic oxidation conducted at 900 °C, the porous Ti-Al-Si-Nb alloy showed a progressive gain in weight of ~3 wt% 100 h to ~12 wt% after 900 h. EDS analysis confirmed the presence of O and N around the pores on the 800 °C and 900 °C annealed samples. The density of the porous Ti-Al-Si-Nb alloy increased with the holding time during cyclic oxidation.

Original language	English
Pages (from-to)	717-723
Number of pages	7
Journal	Materials Today: Proceedings
Volume	38
DOIs	https://doi.org/10.1016/j.matpr.2020.03.829
Publication status	Published - 1 Jan 2021
Externally published	Yes
Event	2020 International Symposium on Nanostructured, Nanoengineered and Advanced Materials, ISNNAM 2020 - Gold Reef City, South Africa Duration: 30 Apr 2020 → 3 May 2020

Keywords

A356
FCC
Oxidation
Porosity
Sintering
TiAlSiNb alloy

ASJC Scopus subject areas

General Materials Science

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10.1016/j.matpr.2020.03.829

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@article{a0c86c37d7ec4b86bf8ffe102d0d0939,

title = "Development of V-free porous Ti-A356-Nb alloy by liquid sintering of compacted powders and its oxidation behaviour",

abstract = "Porous Ti-Al-Si-Nb alloy was developed through a mixture of Ti, A356 Al alloy and Nb powders followed by compaction and sintering. The sintered Ti-Al-Si-Nb alloy was comprised of the a and b-phases after sintering. The Nb content was predominately found in the b-phase. XRD technique has detected the FCC phase (5.750 {\AA}), the HCP (5.140 {\AA}; c = 9.480 {\AA}) and tetragonal Ti3Al (4.585 {\AA}; c = 2.960 {\AA}) phases. Upon cyclic oxidation conducted at 900 °C, the porous Ti-Al-Si-Nb alloy showed a progressive gain in weight of \textasciitilde{}3 wt\% 100 h to \textasciitilde{}12 wt\% after 900 h. EDS analysis confirmed the presence of O and N around the pores on the 800 °C and 900 °C annealed samples. The density of the porous Ti-Al-Si-Nb alloy increased with the holding time during cyclic oxidation.",

keywords = "A356, FCC, Oxidation, Porosity, Sintering, TiAlSiNb alloy",

author = "Bolokang, \{A. S.\} and Motaung, \{D. E.\} and Arendse, \{C. J.\}",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the International Symposium on Nanostructured, Nanoengineered and Advanced Materials.; 2020 International Symposium on Nanostructured, Nanoengineered and Advanced Materials, ISNNAM 2020 ; Conference date: 30-04-2020 Through 03-05-2020",

year = "2021",

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doi = "10.1016/j.matpr.2020.03.829",

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TY - JOUR

T1 - Development of V-free porous Ti-A356-Nb alloy by liquid sintering of compacted powders and its oxidation behaviour

AU - Bolokang, A. S.

AU - Motaung, D. E.

AU - Arendse, C. J.

N1 - Publisher Copyright: © 2019 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the International Symposium on Nanostructured, Nanoengineered and Advanced Materials.

PY - 2021/1/1

Y1 - 2021/1/1

N2 - Porous Ti-Al-Si-Nb alloy was developed through a mixture of Ti, A356 Al alloy and Nb powders followed by compaction and sintering. The sintered Ti-Al-Si-Nb alloy was comprised of the a and b-phases after sintering. The Nb content was predominately found in the b-phase. XRD technique has detected the FCC phase (5.750 Å), the HCP (5.140 Å; c = 9.480 Å) and tetragonal Ti3Al (4.585 Å; c = 2.960 Å) phases. Upon cyclic oxidation conducted at 900 °C, the porous Ti-Al-Si-Nb alloy showed a progressive gain in weight of ~3 wt% 100 h to ~12 wt% after 900 h. EDS analysis confirmed the presence of O and N around the pores on the 800 °C and 900 °C annealed samples. The density of the porous Ti-Al-Si-Nb alloy increased with the holding time during cyclic oxidation.

AB - Porous Ti-Al-Si-Nb alloy was developed through a mixture of Ti, A356 Al alloy and Nb powders followed by compaction and sintering. The sintered Ti-Al-Si-Nb alloy was comprised of the a and b-phases after sintering. The Nb content was predominately found in the b-phase. XRD technique has detected the FCC phase (5.750 Å), the HCP (5.140 Å; c = 9.480 Å) and tetragonal Ti3Al (4.585 Å; c = 2.960 Å) phases. Upon cyclic oxidation conducted at 900 °C, the porous Ti-Al-Si-Nb alloy showed a progressive gain in weight of ~3 wt% 100 h to ~12 wt% after 900 h. EDS analysis confirmed the presence of O and N around the pores on the 800 °C and 900 °C annealed samples. The density of the porous Ti-Al-Si-Nb alloy increased with the holding time during cyclic oxidation.

KW - A356

KW - FCC

KW - Oxidation

KW - Porosity

KW - Sintering

KW - TiAlSiNb alloy

UR - https://www.scopus.com/pages/publications/85105482173

U2 - 10.1016/j.matpr.2020.03.829

DO - 10.1016/j.matpr.2020.03.829

M3 - Conference article

AN - SCOPUS:85105482173

SN - 2214-7853

VL - 38

SP - 717

EP - 723

JO - Materials Today: Proceedings

JF - Materials Today: Proceedings

T2 - 2020 International Symposium on Nanostructured, Nanoengineered and Advanced Materials, ISNNAM 2020

Y2 - 30 April 2020 through 3 May 2020

ER -

Development of V-free porous Ti-A356-Nb alloy by liquid sintering of compacted powders and its oxidation behaviour

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Keywords

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