Titanium metal matrix composites by powder metallurgy (PM) routes

Kondoh, Katsuyoshi

doi:10.1016/b978-0-12-800054-0.00016-2

Cited by 40 publications

(31 citation statements)

References 49 publications

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“…Of the fibers or particulate materials used as reinforcement for Ti-based composites, titanium carbide (TiC) has been widely investigated because of its excellent chemical compatibility with the matrix alloys [1][2][3]. Ti-TiC composites can be prepared by different routes although the most widely used is the classical powder metallurgy route [4,5]. The nature of bonding at the matrix-reinforcement interface and the existence and extent of any reaction zone determine, to a large extent, the properties of the composite material.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Ti matrix composites reinforced with TiC particles: thermodynamic equilibrium and change in microstructure

et al. 2016

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International audienceThe evolution of TiC reinforcement during the high-temperature consolidation step of a particulate-reinforced Ti matrix composite has been studied. A four-step scenario has been highlighted starting with the dissolution of the smallest particles to reach C saturation of the Ti matrix, followed by a change in the TiC stoichiometry from the initial TiC 0.96 composition to the equilibrium composition (TiC 0.57). This change in composition induces an increase in both the total mass fraction of reinforcement and the particle diameter. The diameter increase promotes contact between individual particles in the most reinforced domains and initiates an aggregation phenomenon that is responsible for the observed high growth rate of particles for heat treatment times shorter than 1h. Finally Ostwald ripening is responsible for the growth of particles for longer heat treatment times. 1. Introduction In the general context of structural lightening in the aerospace industry, Metal Matrix Composites (MMC) materials have attracted much interest over the past decades because of their high specific mechanical properties (relative to density) compared to existing metallic alloys. Of the fibers or particulate materials used as reinforcement for Ti-based composites, titanium carbide (TiC) has been widely investigated because of its excellent chemical compatibility with the matrix alloys [1–3]. Ti-TiC composites can be prepared by different routes although the most widely used is the classical powder metallurgy route [4, 5]. The nature of bonding at the matrix-reinforcement interface and the existence and extent of any reaction zone determine, to a large extent, the properties of the composite material. From the binary TiC phase diagram (see Figure 1-[6]), the expected interaction between a Ti-based matrix and commercial stoichiometric TiC particles, consists of the formation of a sub-stoichiometric form of the carbide according to reaction (1)

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Section: Introductionmentioning

confidence: 99%

Synthesis of Ti matrix composites reinforced with TiC particles: thermodynamic equilibrium and change in microstructure

et al. 2016

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“…In several investigations concerning the manufacture of titanium composites via powder metallurgy (PM) [27,28], inductive hot pressing (iHP) is considered as a suitable fabrication option due to its flexibility and short cycles. For that reason, and thanks to the experience of the authors on TMCs manufacturing, the fabrication route of the specimens was through iHP.…”

Section: Introductionmentioning

confidence: 99%

Reaction Layer Analysis of In Situ Reinforced Titanium Composites: Influence of the Starting Material Composition on the Mechanical Properties

Montealegre-Meléndez

Arévalo

Beltrán

et al. 2020

Metals

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This study aims at the analysis of the reaction layer between titanium matrices and reinforcements: B 4 C particles and/or intermetallic Ti x Al y . Likewise, the importance of these reactions was observed; this was particularly noteworthy as regard coherence with the obtained results and the parameters tested. Accordingly, five starting material compositions were studied under identical processing parameters via inductive hot pressing at 1100 • C for 5 min in vacuum conditions. The results revealed how the intermetallics limited the formation of secondary phases (TiC and TiB) created from the B and C source. In this respect, the percentages of TiB and TiC slightly varied when the intermetallic was included in the matrix as prealloyed particles. On the contrary, if the intermetallics appeared in situ by the addition of Ti-Al powder in the starting blend, their content was lesser. The mechanical properties values and the tribology behaviour might deviate, depending on the percentage of the secondary phases formed and its distribution in the matrix.

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“…Over the last few decades, titanium matrix composites (TMCs) have been considered as valuable materials for diverse applications in aerospace industries. This sector demands materials that can achieve high specific stiffness in addition to possessing good thermal stability at high operational temperatures, such as TMCs [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, powder metallurgy (PM) technologies overcome certain problems of conventional processes: wettability between the matrix and the ceramic reinforcements, and long and complex processing steps [7]; for that reason, powder metallurgy (PM) processes have been widely used for the fabrication of TMCs. In this context, two types of PM routes have been established to produce these specific materials: ex situ and in situ methods [2]. In ex situ processes, stable ceramics such as TiC, TiB, SiC, and ZrC have been generally employed.…”

Section: Introductionmentioning

confidence: 99%

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Study of the Influence of TiB Content and Temperature in the Properties of In Situ Titanium Matrix Composites

Arévalo

Montealegre-Meléndez

Ariza

et al. 2017

Metals

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This work focuses on the study of the microstructure, hardening, and stiffening effect caused by the secondary phases formed in titanium matrices. These secondary phases originated from reactions between the matrix and boron particles added in the starting mixtures of the composites. Not only was the composite composition studied as an influencing factor in the behaviour of the composites, but also different operational temperatures. Three volume percentages of boron content were tested (0.9 vol %, 2.5 vol %, and 5 vol % of amorphous boron). The manufacturing process used to produce the composites was inductive hot pressing, which operational temperatures were between 1000 and 1300 • C. Specimens showed optimal densification. Moreover, microstructural studies revealed the formation of TiB in various shapes and proportions. Mechanical testing confirmed that the secondary phases had a positive influence on properties of the composites. In general, adding boron particles increased the hardness and stiffness of the composites; however rising temperatures resulted in greater increases in stiffness than in hardness.

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Titanium metal matrix composites by powder metallurgy (PM) routes

Cited by 40 publications

References 49 publications

Synthesis of Ti matrix composites reinforced with TiC particles: thermodynamic equilibrium and change in microstructure

Synthesis of Ti matrix composites reinforced with TiC particles: thermodynamic equilibrium and change in microstructure

Reaction Layer Analysis of In Situ Reinforced Titanium Composites: Influence of the Starting Material Composition on the Mechanical Properties

Study of the Influence of TiB Content and Temperature in the Properties of In Situ Titanium Matrix Composites

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