Effects of microstructures on the sliding behavior of hot-pressed CoCrMo alloys

Effect of Si on Microstructure and Corrosion Behavior of CoCrMo Alloys

“…In addition, they are recommended for use in metal-on-metal joint replacement applications because of their high wear resistance and hardness [4,5]. However, CoCrMo alloys which expose to the environment is undergone an oxidation as well as other metallic biomaterials.…”

Uneven damage on head and liner contact surfaces of a retrieved Co–Cr-based metal-on-metal hip joint bearing: An important reason for the high failure rate

“…The wear behavior of biomedical CCM alloys has been studied using various techniques such as pin-on-disk type wear tests [11][12][13][14], specially designed wear-testing machines [15,16], hip simulators [17][18][19][20], and through the inspection of used hip joint implants retrieved from patients [21][22][23][24]. These investigations have indicated that different factors can significantly affect the wear behavior, such as the combination of mated materials, surface roughness, lubrication conditions, loading conditions, and the type of motion.…”

Mechanical properties of hot pressed CoCrMo alloy compacts for biomedical applications

“…Co-Cr-Mo alloys are one of the most important biomaterials used in the production of implants and dental prosthetic infrastructures due to its high stiffness, strength, wear and corrosion resistance [1][2][3][4][5][6][7]. The tarnish and corrosion resistance of these alloys are provided by the presence of chromium in the alloy, which should not greatly exceed 30% for ease of casting.…”

“…Hence, components obtained by press and sinter technique often exhibit porosity, which negatively affects its mechanical and electrochemical behavior [22,23]. On the other hand, routes that include hot consolidation of powders such as hot pressing (HP) and hot isostatic pressing (HIP) address these problems by the simultaneous application of temperature and pressure to the compact [6,24].…”

“…Thus, few studies can be found on this topic in literature. Chen et al [6] and Doni et al [5,25] performed studies on the wear properties of CoCrMo hot pressed compacts. Sato et al [26,27] and Naoyuki et al [28] reported some results on the mechanical properties of dense and porous CoCrMo compacts.…”