Sliding wear performance of in-situ spark plasma sintered Ti-TiBw composite at temperatures up to 900 °C

Kumar, Rahul; Antonov, Maksim; Liu, Le; Hussainova, Irina

doi:10.1016/j.wear.2021.203663

Cited by 26 publications

(21 citation statements)

References 41 publications

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“…Figure 2a demonstrates the SEM image of the composite revealing rather homogeneous distribution of TiB phase (grey) throughout the monoclinic Ti (white). The TiB-Ti composite produced by SPS from the conventionally milled/mixed commercially available powders of Ti and TiB2 are detailed in [19]. Fabrication of the fully dense composites with a high hardness of ⁓1324 HV30 and an indentation fracture toughness of 10.5 MPa•m 1/2 has been reported.…”

Section: Microstructural Analysismentioning

confidence: 99%

“…Relative Density (%) Hardness IFT (MPa⋅m 1/2 ) SPS 97.92 ± 0.03 291 ± 10 (HV30) - [15] Mixing + SPS 99.6% -9.35 [19] Mixing + SPS 99.4% 1324 ± 18 (HV30) 10.52 [24] Ball The Vickers' hardness of TiB is about 1800 HV and, therefore, the high hardness of the TiB rich composite in the current research is ascertained (Table 2). Apart from a high hardness, a good IFT value (8.2 MPa•m 1/2 ) is demonstrated due to the presence of metallic Ti in the composite.…”

Section: Processmentioning

confidence: 99%

“…Moreover, the wear is intensified by brittleness of original material, which can be easily fractured by wear debris retained in the wear scar. Apart from oxidation, micropolishing, which is commonly reported phenomenon under elevated and high temperatures sliding [19], can also be considered as one of the wear mechanisms. Figure 8c demonstrates the effect of temperature on surface hardness and weight gain of Ti-TiB composite.…”

Section: Sliding Wearmentioning

confidence: 99%

“…As the formation of glazed layers of compacted oxides can provide wear protection to the composites at elevated temperatures [18,19], the current research work reports on the development of a tribo-layer during the sliding wear of spark plasma sintered Ti-TiB cermet of only 12 wt.% metal content, which were fabricated from the SHS produced "pomegranate-like" powders of Ti and TiB. Wear of the composite has been studied at the conditions of dry sliding at room (20 • C) and elevated (800 • C) temperatures.…”

Section: Introductionmentioning

confidence: 99%

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Hot Sliding Wear of 88 wt.% TiB–Ti Composite from SHS Produced Powders

et al. 2021

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Titanium alloys and composites are of great interest for a wide variety of industrial applications; however, most of them suffer from poor tribological performance, especially at elevated temperatures. In this study, spark plasma sintering was utilized to produce a fully dense and thermodynamically stable TiB–Ti composite with a high content of ceramic phase (88 wt.%) from self-propagating high temperature synthesized (SHS) powders of commercially available Ti and B. Microstructural examination, thermodynamic assessments, and XRD analysis revealed the in situ formation of titanium borides with a relatively broad grain size distribution and elongated shapes of different aspect ratio. The composite exhibits a considerable hardness of 1550 HV30 combined with a good indentation fracture toughness of 8.2 MPa·m1/2. Dry sliding wear tests were performed at room and elevated temperature (800 ℃) under 5 and 20 N sliding loads with the sliding speed of 0.1 m·s−1 and the sliding distance of 1000 m. A considerable decline in the coefficient of friction and wear rate was demonstrated at elevated temperature sliding. Apart from the protective nature of generated tribo-oxide layer, the development of lubricious boric acid on the surface of the composite was wholly responsible for this phenomenon. A high load bearing capacity of tribo-layer was demonstrated at 800 ℃ test.

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Section: Microstructural Analysismentioning

confidence: 99%

Section: Processmentioning

confidence: 99%

Section: Sliding Wearmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hot Sliding Wear of 88 wt.% TiB–Ti Composite from SHS Produced Powders

et al. 2021

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“…To obtain the 15-85% weight ratio of metallic and ceramic components, the precursor powders of approximately 50-50% weight ratio for Ti or Ti6Al4V and TiB 2 were mixed either by the conventional or disintegrator (DSL-175) system mixing; the specimens are designated as materials of Group I and Group II. The composites of Group III were fabricated from the powders synthesized by self-propagating high-temperature synthesis (SHS) of the elemental titanium and boron powders as detailed in [26,27]. Scanning electron microscope (SEM) (HRSEM Zeiss Merlin, ZEISS, Oberkochen, Germany) images of developed powders are shown in Figure 1 (the first row).…”

Section: Tib 2 /Ti Compositesmentioning

confidence: 99%

Sliding Wear Performance of AlCrN Coating on TiB2/Ti Composites at High Temperatures

et al. 2021

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The aim of the study was to investigate effect of Ti/TiB2 composite composition and manufacturing technology parameters on the tribological behaviour of AlCrN coating-composite system. The AlCrN coating was deposited by PVD (Physical Vapour Deposition) method. The composites were manufactured by spark plasma sintering (SPS) from three variants of powders mixtures: Ti with TiB2, Ti6Al4V with TiB2 as well as Ti with B, using (five) different sintering temperatures. For each of the developed coating-composite systems, the wear resistance was evaluated using ball-on-disc SRV tester, at six temperatures (from room temperature up to 900 °C). The results confirmed that high-temperature wear resistance of the coating–substrate combination depends on Ti/TiB2 composite composition and manufacturing technology parameters. In the case of uncoated composite, two processes manage the wear at high temperatures: cracking propagation and surface oxidation. The presence of AlCrN coating on the composite surface protects the surface against deep cracking and surface oxidation. The composites of Group I, sintered at 1250 °C from a mixture of pure Ti and TiB2 (50/50 wt.% ratio) as well as Group III, sintered at 1350 °C from a mixture of pure Ti and B allow the achievement of a satisfactory surface quality, a high adhesion of the PVD coating and moderate wear at high temperatures. However, the composite made of pure Ti and B seems to be a better solution for temperatures exceeding 600 °C.

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