Microstructure and tribological properties of Cr3C2/Ni3Al composite materials prepared by hot isostatic pressing (HIP)

Abstract

Fe) phase is formed in Cr 3 C 2 /Ni 3 Al composites prepared by hot isostatic pressing. • The hardness of the Cr 3 C 2 /Ni 3 Al composites increases with increasing addition of Cr 3 C 2. • The wear resistance of Cr 3 C 2 /Ni 3 Al composites is improved due to the Cr 3 C 2 asperities keep the sliding surfaces apart. • Excess addition of Cr 3 C 2 (such as 24 vol%) can decrease the wear resistance of Cr 3 C 2 /Ni 3 Al composites.

Microstructures and mechanical properties of Cu/Ti3SiC2/C/graphene nanocomposites prepared by vacuum hot-pressing sintering and hot isostatic pressing

“…Cu/Ti3SiC2/C/Graphene nanocomposite materials were designed based on the concept of multi-phase composites and prepared by powder metallurgy re-pressing methods-that is, VHP sintering and HIP. The process includes mechanical ball-milling, compacting, and sintering process in which a component is subjected to both elevated temperature and high pressure [44].The physical parameters of graphene, graphite powder, Ti3SiC2 powder, and electrolytic copper powder used as raw material are listed in Table 1. Dispersions of graphene assisted by ultrasonic oscillation, plasma, and chemical treatment surface modification were prepared using Ar-NH3 plasma and 0.02µg/mL rutin solution [45][46].The raw powders consisting of 10 wt.% Ti3SiC2, 3 wt.% graphite, different contents of graphene (0.5 wt.%, 1.0 wt.%, 1.5 wt.%) and copper were mixed by high-energy ball milling for 1 h. Composite powders were heated from room temperature to 950°C and applied with pressure of 27.7 MPa for 30min.…”

“…sintering process of the copper matrix (i.e., formation of a sintering neck), increases the number of voids, and increases porosity. be compressed to an oblate form after single-phase loading during VHP sintering [44]. The diameter of the copper particles in direction I is smaller than that in direction II.…”

Investigating the Influence of Al Contents on Microstructure and Mechanical Properties of Ni3Al Superalloy Fabricated by Twin Wire‐Based Direct Arc Energy Deposition

“…Their manufacturing typically involves casting, [5] cold rolling, [6] and powder metallurgy technologies. [7,8] Recently, additive manufacturing has attracted significant attention because of its digital, flexible, and controllable fabrication process for the direct and fast production of metal components. [9] Application of additive manufacturing on Ni-based superalloy, e.g., precipitation hardening type Inconel 738 alloy, provides a new perspective for prototype manufacturing of Ni 3 Al superalloy components.…”

Microstructure and Wear Resistance of a Cr7C3 Reinforced Ni3Al Composite Coating Prepared by Laser Cladding

“…Early studies have shown that the high temperature strength and hardness of Ni 3 Al alloy can be significantly increased by adding Cr 3 C 2 particles, which have the advantages of high hardness, high-temperature stability, excellent high-temperature wear resistance, high compatibility, and wettability with the Ni 3 Al matrix [9][10][11][12]. Fu et al [13] prepared a Cr 3 C 2 /Ni 3 Al composite material using hot isostatic pressing technology, and studied the influence of different chromium carbide contents on the wear resistance of the composite. It was found that a certain content of chromium carbide can effectively improve the wear resistance of the material.…”