Powder sintering of porous Ti–15Mo alloy from TiH2 and Mo powders

Li, Yonghua; Chen, Rui-Bo; Qi, Guangxia; Wang, Zhongtang; Deng, Zhaohui

doi:10.1016/j.jallcom.2009.06.003

Cited by 51 publications

(29 citation statements)

References 17 publications

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“…Powder sintering is a heat treatment applied at elevated temperature to a powder compact in order to impart strength and integrity. At sintering temperature, diffusion processes cause necks to form and grow at these contact points [22,23]. In order to fabricate porous metals, ammonium hydrogen carbonate NH 4 HCO 3 can be considered as a candidate for a space holder because it may be decomposed to gaseous components by heating below 473 K without polluting the sample [23].…”

Section: Powder Metallurgymentioning

confidence: 99%

“…The hydride decomposes into titanium and hydrogen, which acts as a protective atmosphere. The substitution of Ti with TiH 2 may accelerate the sintering process and decrease the oxidation of titanium [23]. Ball milled elemental Ti and Mo powders have been used to produce porous Ti-10Mo alloy by PM [22].…”

Section: Powder Metallurgymentioning

confidence: 99%

“…After that, the compacts are sintered between 1 373 K and 1 473 K. X-ray diffraction (XRD) patterns of the sintered porous alloy indicate that there is no elemental Mo phase because of the physical diffusion and complete solid solution of Mo in the alloy. Meanwhile, XRD results show that space holder has little influence on the phases of the sintered alloy [23]. Figure 1 presents a scanning electron microscopy (SEM) image of the sintered porous Ti-15Mo alloy with porosity of 68.5 %.…”

Section: Powder Metallurgymentioning

confidence: 99%

“…Porosity and mean pore size (100 -400 lm) of the sintered porous Ti-(10 -15) Mo alloys increase and the pore distribution becomes uniform with the increasing amount of added NH 4 HCO 3 . The interconnected porous structure with mean pore size larger than 100 lm is the preliminary requirement to allow bone tissue ingrowth and body fluid transportation [5,23].…”

Section: Powder Metallurgymentioning

confidence: 99%

“…The latter is relevant to biochemical compatibility. The Young's moduli of the aforementioned metals ranging from 120 to 232 GPa are substantially larger than those of cancellous (1 -2 GPa) and cortical (20)(21)(22)(23)(24)(25)(26)(27) bones [5]. Therefore, stress shielding, a critical issue in hard tissue replacement, which originates from the mismatch of Young's modulus, may cause osteoporosis of the surrounding bone tissue.…”

Section: Introductionmentioning

confidence: 99%

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Current developments of biomedical porous Ti–Mo alloys

Wang

2017

International Journal of Materials Research

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Current developments of biomedical porous Ti-Mo alloysAs a biomedical hard tissue implant candidate, porous Ti-Mo alloy has received considerable attention because of its special porous structure, appropriate Young's modulus and compressive strength as well as good corrosion resistance. As a bioactive coating, hydroxyapatite is commonly used to cover the surface of bioinert metallic prostheses due to its excellent biocompatibility, bone-like structure and composition. This article reviews the current developments and the relationships between the fabrication methods, porous structure, mechanical properties, bioactive surface modification and corrosion behavior of porous Ti-Mo alloy used for hard tissue implant application. Furthermore, the future research directions are discussed to optimize the porous structure and improve the properties of porous Ti-Mo alloys.

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Section: Powder Metallurgymentioning

confidence: 99%

Section: Powder Metallurgymentioning

confidence: 99%

Section: Powder Metallurgymentioning

confidence: 99%

Section: Powder Metallurgymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Current developments of biomedical porous Ti–Mo alloys

Wang

2017

International Journal of Materials Research

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A perspective on molybdenum biocompatibility and antimicrobial activity for applications in implants

2015

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Properties of open-cell porous metals and alloys for orthopaedic applications

Lewis

2013

J Mater Sci: Mater Med

102

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One shortcoming of metals and alloys used to fabricate various components of orthopaedic systems, such as the femoral stem of a total hip joint replacement and the tibial plate of a total knee joint replacement, is well-recognized. This is that the material modulus of elasticity (E') is substantially larger than that of the contiguous cancellous bone, a consequence of which is stress shielding which, in turn, has been postulated to be implicated in a cascade of events that culminates in the principal life-limiting phenomenon of these systems, namely, aseptic loosening. Thus, over the years, a host of research programs have focused on the synthesis of metallic biomaterials whose E' can be tailored to match that of cancellous bone. The present work is a review of the extant large volume of literature on these materials, which are called open-cell porous metals/alloys (or, sometimes, metal foams or cellular materials). As such, its range is wide, covering myriad aspects such as production methods, characterization studies, in vitro evaluations, and in vivo performance. The review also includes discussion of seven areas for future research, such as parametric studies of the influence of an assortment of process variables (such as the space holder material and the laser power in the space holder method and the laser-engineered net-shaping process, respectively) on various properties (notably, permeability, fatigue strength, and corrosion resistance) of a given porous metal/alloy, innovative methods of determining fatigue strength, and modeling of corrosion behavior.

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Powder sintering of porous Ti–15Mo alloy from TiH2 and Mo powders

Cited by 51 publications

References 17 publications

Current developments of biomedical porous Ti–Mo alloys

Current developments of biomedical porous Ti–Mo alloys

A perspective on molybdenum biocompatibility and antimicrobial activity for applications in implants

Properties of open-cell porous metals and alloys for orthopaedic applications

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