Microstructure evolution of TiAl matrix in the process of magnetron sputtering and hot isostatic pressing for fabricating TiAl/SiCf composites

Zhang, Wen; Yang, Yanqing; Zhao, Guangming; Bin, Huang; Li, M.H.; X, Luo; Ouyang, Sheng

doi:10.1016/j.intermet.2013.03.010

Cited by 11 publications

(4 citation statements)

References 27 publications

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“…In the diffractograms of the TiAl films, the characteristic peaks are not perceptible, and consequently the phases in the films cannot be identified, so this coating also grew amorphously. These results are consistent with the investigations by Zhang et al [28], who sputtered TiAl coatings and reshaped their amorphous structure. They explain that this behavior is due to the fact that the formation of critical nuclei is difficult in TiAl.…”

Section: Resultssupporting

confidence: 93%

Study of Adhesive Wear Test on TiSi, AlTi, and WTi Coatings

et al. 2022

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Coatings based on Ti, Si, W, and Al synthesized by different techniques have been investigated in order to better understand their properties; however, there are few results related to their wear behavior. In this paper, TiSi, AlTi, and WTi coatings were applied by means of a sputtering system on 316L stainless steel substrates in order to evaluate their behavior through a ball-on-disc wear test. Adhesive wear tests were carried out using the ball-on-disc technique, which allowed the coefficient of friction to be measured. The morphological characterization was based on an analysis of the SEM images and on the optical profilometry of the wear traces of the coatings, used to calculate the wear rate. An analysis of the wear products was carried out based on information provided by the SEM-EDS, Raman spectroscopy, and XPS techniques, which provided information about the tribo-chemical behavior of the coatings subjected to the ball-on-disc test. The morphological analysis showed that the TiSi and AlTi coatings exhibited premature failure, which was corroborated by means of the coefficient of friction curves. It was also observed that the WTi coating exhibited better behavior against the wear test, with a coefficient of friction lower than that of the stainless-steel substrate, without showing evidence of premature failure, which can be explained as a consequence of the tribo-chemical behavior of the WxOy produced in the coating.

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Section: Resultssupporting

confidence: 93%

Study of Adhesive Wear Test on TiSi, AlTi, and WTi Coatings

et al. 2022

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“…This titanium alloy is expected to serve as an efficient barrier for preventing severe reaction between the alloy melt and SiC fiber during casting and at the same time facilitate better bonding of the fiber with the γ-TiAl matrix alloy. Most of SiC f /γ-TiAl composite studies focused on the interfacial reaction between the fiber and the matrix [21][22][23], whereas very few reports can be found on the mechanical properties. With the view of fabricating composite parts with large size, for example low-pressure turbine blade, a new composite preparation method by suction casting was developed in this study.…”

Section: Introductionmentioning

confidence: 99%

Tensile Behavior of SiC Fiber-Reinforced γ-TiAl Composites Prepared by Suction Casting

Shen

Jia

Zhang

et al. 2021

Acta Metall. Sin. (Engl. Lett.)

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The process of preparing SiC fiber-reinforced γ-TiAl composites by the conventional methods is difficult and complicated due to the high reactivity, high melting point and poor deformability of γ-TiAl alloys. In this work, suction casting, a promising method for preparing SiC f /TiAl composite, had been attempted. In the process, γ-TiAl alloy melt was introduced rapidly into a mold within pre-arranged fibers that were coated with additional layer of titanium alloy. This simple method successfully prevented serious reactions between the alloy melt and the fibers which remained intact during the solidification process. The interfacial reaction layer was observed by optical microscopy, scanning electron microscopy (SEM). The interfacial reaction products were identified by transmission electron microscopy (TEM). Tensile tests of the matrix alloy and composites were performed at room temperature and 800 °C. The results exhibited that the tensile strength of SiC f /γ-TiAl composite was higher than that of the matrix alloy at both room temperature and 800 °C. At room temperature, tensile strength of SiC f /γ-TiAl composite was increased by about 7% (50 MPa), whereas a double increase in tensile strength 14% (100 MPa) was obtained at 800 °C. The titanium alloy coating on the fiber not only prevented the serious interfacial reaction between the γ-TiAl alloy melt and the SiC fiber, but also played a role in delaying the propagation of cracks in the matrix to the fiber at 800 °C. The fracture mechanism of the composite was analyzed by fracture metallographic analysis.

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“…Composite technology is an attractive method to improve the high temperature mechanical properties of TiAl alloy. Some ceramic particles, such as TiB 2 , 14 Al 2 O 3 , 15 Ti 5 Si 3 , 16 SiC, 17 etc., have been reported as suitable additives to strengthen TiAl alloy. However, these brittle and light compounds often cause the plasticity sacrifice of TiAl alloy.…”

Section: Introductionmentioning

confidence: 99%

“…Advanced TiAl alloys have been regarded as the next-generation lightweight structural materials in the aviation and automobile industries due to their attractive mechanical properties and good oxidation resistance. − However, the inherent brittleness of the alloys at room temperature restricted their practical applications. − Over the last decades, many studies have been carried out to improve the mechanical properties and toughness of TiAl alloys, such as heat treatment, , alloying, − and composite technology. − Clemens et al reported that the grain size of the γ-TiAl alloy can be significantly refined by heat-treatments due to the suppression of the α → α + γ transformation. Numerous research studies on alloying have been performed to improve the TiAl alloy properties by adding both metallic (Nb, Cr, Mn, Ni, W) − and nonmetallic (B, Si) , alloying elements, which can further improve the mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Ti₂Al(C, N) Solid Solution Reinforcing TiAl-Based Composites: Evolution of a Core–Shell Structure, Interfaces, and Mechanical Properties

Song

Cui

Han

et al. 2018

ACS Appl. Mater. Interfaces

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In this work, TiAl(C, N) solid solution with lamellar structure-enhanced TiAl matrix composites was synthesized by vacuum arc melting, using bulk g-CN, Ti, and Al powders as raw materials. The phases, microstructures, interfaces, and mechanical properties were investigated. MAX phase of TiAl(C, N) solid solution with lamellar structure was formed. During the melting process, first, CN reacted with Ti to form Ti(C, N) by Ti + CN → Ti(C, N). Then TiAl(C, N) was formed by a peritectic reaction of TiAl(l) + Ti(C, N)(s) → TiAl(C, N). CN is the single reactant that provides C and N simultaneously to final product of TiAl(C, N). The interfaces of TiAl//TiAl(C, N) and TiAl(C, N)//Ti(C, N) display perfect orientation relationships with low misfit values. The microhardness, compressive strength, and strain of best-performing TiAl-10 mol % TiAl(C, N) composite were improved by 45%, 55.7%, and 50% compared with the TiAl alloy, respectively. Uniformly distributed TiAl(C, N) and unreacted Ti(C, N) particles contributed to the grain refinement and reinforcement of the TiAl matrix. Laminated tearing, particle pull-out, and the crack-arresting of TiAl(C, N) are crucial for the improvement in compressive strength and plasticity of the composites.

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Microstructure evolution of TiAl matrix in the process of magnetron sputtering and hot isostatic pressing for fabricating TiAl/SiCf composites

Cited by 11 publications

References 27 publications

Study of Adhesive Wear Test on TiSi, AlTi, and WTi Coatings

Study of Adhesive Wear Test on TiSi, AlTi, and WTi Coatings

Tensile Behavior of SiC Fiber-Reinforced γ-TiAl Composites Prepared by Suction Casting

Ti₂Al(C, N) Solid Solution Reinforcing TiAl-Based Composites: Evolution of a Core–Shell Structure, Interfaces, and Mechanical Properties

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Microstructure evolution of TiAl matrix in the process of magnetron sputtering and hot isostatic pressing for fabricating TiAl/SiCf composites

Cited by 11 publications

References 27 publications

Study of Adhesive Wear Test on TiSi, AlTi, and WTi Coatings

Study of Adhesive Wear Test on TiSi, AlTi, and WTi Coatings

Tensile Behavior of SiC Fiber-Reinforced γ-TiAl Composites Prepared by Suction Casting

Ti2Al(C, N) Solid Solution Reinforcing TiAl-Based Composites: Evolution of a Core–Shell Structure, Interfaces, and Mechanical Properties

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Ti₂Al(C, N) Solid Solution Reinforcing TiAl-Based Composites: Evolution of a Core–Shell Structure, Interfaces, and Mechanical Properties