Cargando…

Microstructure and Mechanical Behaviors of Titanium Matrix Composites Containing In Situ Whiskers Synthesized via Plasma Activated Sintering

In this paper, titanium matrix composites with in situ TiB whiskers were synthesized by the plasma activated sintering technique; crystalline boron and amorphous boron were used as reactants for in situ reactions, respectively. The influence of the sintering process and the crystallography type of b...

Descripción completa

Detalles Bibliográficos
Autores principales: Sun, Yi, Zhang, Jian, Luo, Guoqiang, Shen, Qiang, Zhang, Lianmeng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5951428/
https://www.ncbi.nlm.nih.gov/pubmed/29614842
http://dx.doi.org/10.3390/ma11040544
_version_ 1783323018974461952
author Sun, Yi
Zhang, Jian
Luo, Guoqiang
Shen, Qiang
Zhang, Lianmeng
author_facet Sun, Yi
Zhang, Jian
Luo, Guoqiang
Shen, Qiang
Zhang, Lianmeng
author_sort Sun, Yi
collection PubMed
description In this paper, titanium matrix composites with in situ TiB whiskers were synthesized by the plasma activated sintering technique; crystalline boron and amorphous boron were used as reactants for in situ reactions, respectively. The influence of the sintering process and the crystallography type of boron on the microstructure and mechanical properties of composites were studied and compared. The densities were evaluated using Archimedes’ principle. The microstructure and mechanical properties were characterized by SEM, XRD, EBSD, TEM, a universal testing machine, and a Vickers hardness tester. The prepared composite material showed a high density and excellent comprehensive performance under the PAS condition of 20 MPa at 1000 °C for 3 min. Amorphous boron had a higher reaction efficiency than crystalline boron, and it completely reacted with the titanium matrix to generate TiB whiskers, while there was still a certain amount of residual crystalline boron combining well with the titanium matrix at 1100 °C. The composite samples with a relative density of 98.33%, Vickers hardness of 389.75 HV, compression yield strength of up to 1190 MPa, and an ultimate compressive strength of up to 1710 MPa were obtained. Compared with the matrix material, the compressive strength of TC4 titanium alloy containing crystalline boron and amorphous boron was increased by 7.64% and 15.50%, respectively.
format Online
Article
Text
id pubmed-5951428
institution National Center for Biotechnology Information
language English
publishDate 2018
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-59514282018-05-15 Microstructure and Mechanical Behaviors of Titanium Matrix Composites Containing In Situ Whiskers Synthesized via Plasma Activated Sintering Sun, Yi Zhang, Jian Luo, Guoqiang Shen, Qiang Zhang, Lianmeng Materials (Basel) Article In this paper, titanium matrix composites with in situ TiB whiskers were synthesized by the plasma activated sintering technique; crystalline boron and amorphous boron were used as reactants for in situ reactions, respectively. The influence of the sintering process and the crystallography type of boron on the microstructure and mechanical properties of composites were studied and compared. The densities were evaluated using Archimedes’ principle. The microstructure and mechanical properties were characterized by SEM, XRD, EBSD, TEM, a universal testing machine, and a Vickers hardness tester. The prepared composite material showed a high density and excellent comprehensive performance under the PAS condition of 20 MPa at 1000 °C for 3 min. Amorphous boron had a higher reaction efficiency than crystalline boron, and it completely reacted with the titanium matrix to generate TiB whiskers, while there was still a certain amount of residual crystalline boron combining well with the titanium matrix at 1100 °C. The composite samples with a relative density of 98.33%, Vickers hardness of 389.75 HV, compression yield strength of up to 1190 MPa, and an ultimate compressive strength of up to 1710 MPa were obtained. Compared with the matrix material, the compressive strength of TC4 titanium alloy containing crystalline boron and amorphous boron was increased by 7.64% and 15.50%, respectively. MDPI 2018-04-02 /pmc/articles/PMC5951428/ /pubmed/29614842 http://dx.doi.org/10.3390/ma11040544 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Sun, Yi
Zhang, Jian
Luo, Guoqiang
Shen, Qiang
Zhang, Lianmeng
Microstructure and Mechanical Behaviors of Titanium Matrix Composites Containing In Situ Whiskers Synthesized via Plasma Activated Sintering
title Microstructure and Mechanical Behaviors of Titanium Matrix Composites Containing In Situ Whiskers Synthesized via Plasma Activated Sintering
title_full Microstructure and Mechanical Behaviors of Titanium Matrix Composites Containing In Situ Whiskers Synthesized via Plasma Activated Sintering
title_fullStr Microstructure and Mechanical Behaviors of Titanium Matrix Composites Containing In Situ Whiskers Synthesized via Plasma Activated Sintering
title_full_unstemmed Microstructure and Mechanical Behaviors of Titanium Matrix Composites Containing In Situ Whiskers Synthesized via Plasma Activated Sintering
title_short Microstructure and Mechanical Behaviors of Titanium Matrix Composites Containing In Situ Whiskers Synthesized via Plasma Activated Sintering
title_sort microstructure and mechanical behaviors of titanium matrix composites containing in situ whiskers synthesized via plasma activated sintering
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5951428/
https://www.ncbi.nlm.nih.gov/pubmed/29614842
http://dx.doi.org/10.3390/ma11040544
work_keys_str_mv AT sunyi microstructureandmechanicalbehaviorsoftitaniummatrixcompositescontaininginsituwhiskerssynthesizedviaplasmaactivatedsintering
AT zhangjian microstructureandmechanicalbehaviorsoftitaniummatrixcompositescontaininginsituwhiskerssynthesizedviaplasmaactivatedsintering
AT luoguoqiang microstructureandmechanicalbehaviorsoftitaniummatrixcompositescontaininginsituwhiskerssynthesizedviaplasmaactivatedsintering
AT shenqiang microstructureandmechanicalbehaviorsoftitaniummatrixcompositescontaininginsituwhiskerssynthesizedviaplasmaactivatedsintering
AT zhanglianmeng microstructureandmechanicalbehaviorsoftitaniummatrixcompositescontaininginsituwhiskerssynthesizedviaplasmaactivatedsintering