Fabrication of nanoparticulate reinforced metal matrix composites by laser cladding

Abstract

The nanoparticulate reinforced metal matrix composites (nPRMMCs) can further improve the ductility and fracture toughness of conventional microscale PRMMCs. The uniform dispersion of nanosized hard particles in the matrix is vital due to their strong tendency to agglomerate. This paper summarizes the state-of-the-art fabrication process of nPRMMCs by laser cladding via both ex-situ route and in-situ route. Concerns have been focused on the uniform dispersion of nanoparticles and their interface bonding with the matrix. The current challenges and future developments are discussed. This summarization will be helpful for the further research on the fabrication and applications of nPRMMCs

Preparation and Characterization of In Situ Carbide Particle Reinforced Fe-Based Gradient Materials by Laser Melt Deposition

“…As shown in Figure 9e, there were more oxide particles and clear plastic flow and adhesion on the worn surface of 12CrNi2V low alloy steel. It was indicated that the temperature of the contact points was high during sliding wear test, which resulted in a rapid decrease of the microhardness near the contact points [45]. Under the combined effect of normal stress and shear stress, the surface of low alloy steel was prone to plastic deformation.…”

Wetting, reactivity, and phase formation at interfaces between Ni–Al melts and TiB2 ultrahigh‐temperature ceramic

“…Investigations of high‐temperature wettability and interfacial interactions between liquid metals and ceramics are driven, for example, by the technological demand in obtaining advanced in situ composites, additive manufacturing, and reliable joining of ultrahigh‐temperature ceramics for aggressively chemical and/or thermal environments . In this view, the Ni–Al/TiB 2 system is particularly interesting . The Ni 3 Al intermetallic is characterized by very good properties at elevated temperatures, such as high tensile and compressive yield strength, fatigue resistance, and oxidation resistance, but it is brittle at room temperature .…”

“…[1][2][3][4][5][6][7][8][9][10][11][12] In this view, the Ni-Al/TiB 2 system is particularly interesting. [13][14][15][16][17][18][19][20][21][22][23][24][25] The Ni 3 Al intermetallic is characterized by very good properties at elevated temperatures, such as high tensile and compressive yield strength, fatigue resistance, and oxidation resistance, but it is brittle at room temperature. 23 The NiAl compound shows excellent oxidation resistance, high melting temperature, modulus, and thermal conductivity for high-temperature structural applications, 22 but it has a low strength and a poor creep resistance at elevated temperatures and is brittle at room temperature.…”