Microstructure and Wear Resistance of a Novel Mo-Ni-Si System Intermetallic Composite with Ductile Mo Phase

Abstract

It has been a challenge to improve the toughness of intermetallic compound at low and medium temperatures for developing wear resistance materials. The refractory metals, with a high melting point, strong atomic bonds, high ductility and toughness, are ideal toughening phases for intermetallic composites. This paper presents a novel composite having the microstructure of ductile Mo primary dendrites, binary intermetallic compound NiMo and ternary metallic silicide Mo 2 Ni 3 Si. The composite exhibits outstanding wear resistance and pretty low wear-load coef cient at ambient temperature, which are attributed to the contribution of refractory metal Mo to toughness of intermetallic matrix, in addition to the high strength and hardness of binary NiMo and ternary Mo 2 Ni 3 Si intermetallic phases. The wear mechanism analyzed by examining the worn surface and debris morphologies is in terms of soft abrasive wear.

Metal Matrix Composite Material Based on Wear Resistance in Sandstone Relief Fresco Exterior Wall Construction

“…In particular, the application of sandstone relief is slowly increasing. Because of the large-scale sandstone, in cultural places, parks and other places, it can be seen that reliefs and buildings are combined to form a single structure, and the buildings are processed [13].…”

Structure Formation and Tribological Properties of Mo-Si-B-Hf Electrospark Coatings Based on Mo2Ni3Si Laves Phase

“…In 2003-2019, a large amount of research was carried out to study composite materials and coatings containing ternary metal silicide Mo2Ni3Si as the main phase [15][16][17][18][19][20][21][22][23][24][25][26][27]. The interest in these composites is due to the fact that, compared to binary metal silicides, the Mo 2 Ni 3 Si phase has a higher toughness while maintaining high hardness [15][16][17].…”

“…The interest in these composites is due to the fact that, compared to binary metal silicides, the Mo 2 Ni 3 Si phase has a higher toughness while maintaining high hardness [15][16][17]. The tribological behavior of Mo 2 Ni 3 Si-based composites was studied under dry friction conditions [15][16][17][18][20][21][22][23][24][25][26] and in corrosive environments [19]. The samples were tested at room temperature [16,[18][19][20][21][22][23][24][25][26] and at elevated temperatures [15,17].…”

Microstructures Evolution and Micromechanics Features of Ni-Cr-Si Coatings Deposited on Copper by Laser Cladding

“…Then, Ni- M -Si ( M = Mo, Nb, Cr, Mn, Ti, W) alloy composite materials have been studied widely as important wear-resistant materials. In Ni-Mo-Si alloy composites, Mo 2 Ni 3 Si demonstrates high hardness, excellent ultra-high resistance, high temperature stability, high-temperature oxidation resistance, high-temperature wear resistance, and corrosion resistance [ 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 ].…”