Microstructural characterization and dry sliding wear resistance of MoO2-strengthened γ/NiMo alloys with different primary phases

Lu, Xiao; Wang, H.M.

doi:10.1016/j.matchar.2009.01.016

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…The binary intermetallic compound Ni-Mo has been extensively investigated in the past decades due to its unique topologically close-packed δ-phase structure and attractive thermodynamic properties. But few efforts have been made to study the mechanical properties of Ni-Mo alloys, especially wear resistance [1]. From a tribology point of view, Ni-Mo alloys are expected to be a promising wear resistant candidate material because of high strength, high hardness and strong covalent-dominated atomic bonding.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the vacuum hot pressing process on the mechanical properties, microstructures and material characteristics of Ni–35Mo–15Cr alloys

Chang

Hsiao

Huang³

2021

Powder Metallurgy

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This study fabricated Ni-35Mo-15Cr alloys by the vacuum hot pressing technique. The experiments utilised various hot pressing temperatures (1050°C, 1100°C, 1150°C, and 1200°C) and pressures (20, 35, and 50 MPa) to determine the optimal parameters for Ni-35Mo-15Cr alloys. The experimental result showed that the optimal hot pressing parameters of this alloy were 1150°C at 35 MPa for 1 h. Among them, the sintering density reached 8.92 g•cm −3 , and the hardness and TRS increased to 77.1 HRA and 1218.2 MPa, respectively; while, the electrical conductivity was 7.08 × 10 3 S cm −1 and the polarisation resistance was 294.65 Ω•cm 2 . Furthermore, the TEM observation identified the HCP structures of the Mo 2 C that precipitated in the Ni-35Mo-15Cr alloys, and the [02 21] and [01 12] crystal axis of Mo 2 C can be found. Overall, the properties of Ni-35Mo-15Cr alloys were effectively improved through the hot pressing process.

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Section: Introductionmentioning

confidence: 99%

Investigation of the vacuum hot pressing process on the mechanical properties, microstructures and material characteristics of Ni–35Mo–15Cr alloys

Chang

Hsiao

Huang³

2021

Powder Metallurgy

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“…However, little attention was given to NiMo as a wear material or as a coating, even though some made efforts on its mechanical properties [10]. From the tribological point of view, the covalent-dominant strong atomic bond endows intermetallic NiMo outstanding adhesive wear resistance, and the high hardness and anomalous hardness-temperature relation provide an excellent abrasive wear resistant property [11]. Unfortunately, monolithic NiMo is extremely brittle for structural application.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Tribological Properties of Mo–40Ni–13Si Multiphase Intermetallic Alloy

et al. 2016

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Intermetallic compounds are increasingly being expected to be utilized in tribological environments, but to date their implementation is hindered by insufficient ductility at low and medium temperatures. This paper presents a novel multiphase intermetallic alloy with the chemical composition of Mo–40Ni–13Si (at %). Microstructure characterization reveals that a certain amount of ductile Mo phases formed during the solidification process of a ternary Mo–Ni–Si molten alloy, which is beneficial to the improvement of ductility of intermetallic alloys. Tribological properties of the designed alloy—including wear resistance, friction coefficient, and metallic tribological compatibility—were evaluated under dry sliding wear test conditions at room temperature. Results suggest that the multiphase alloy possesses an excellent tribological property, which is attributed to unique microstructural features and thereby a good combination in hardness and ductility. The corresponding wear mechanism is explained by observing the worn surface, subsurface, and wear debris of the alloy, which was found to be soft abrasive wear.

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“…While versatility in many circumstances is hard to be obtained from a single material, multiphase materials have been designed and demonstrated to successfully combine and balance the properties of their constituting phases [14][15][16][17][18]. Many ternary transition metal silicides crystallized in the structure of the topologically closed packed (TCP) hP12 MgZn 2 type Laves phase, such as W 2 Ni 3 Si, Ti 2 Ni 3 Si, Mo 2 Ni 3 Si and Co 3 Mo 2 Si [19][20][21][22][23], exhibited inherent brittleness otherwise could tend towards real application as high performance wear and corrosion resistant materials, owning to their inherent high hardness, yield anomaly, anomalous hardness-temperature dependence, and strong covalent-dominated bonding nature.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and wear property of laser-clad Co3Mo2Si/Coss wear resistant coatings

Liu

Wang

2010

Surface and Coatings Technology

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Microstructural characterization and dry sliding wear resistance of MoO2-strengthened γ/NiMo alloys with different primary phases

Cited by 5 publications

References 24 publications

Investigation of the vacuum hot pressing process on the mechanical properties, microstructures and material characteristics of Ni–35Mo–15Cr alloys

Investigation of the vacuum hot pressing process on the mechanical properties, microstructures and material characteristics of Ni–35Mo–15Cr alloys

Microstructure and Tribological Properties of Mo–40Ni–13Si Multiphase Intermetallic Alloy

Microstructure and wear property of laser-clad Co3Mo2Si/Coss wear resistant coatings

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