Open-celled porous Cu prepared by replication of NaCl space-holders

Wang, Q.Z.; Cui, Chunxiang; Liu, S.J.; Zhao, Lichen

doi:10.1016/j.msea.2009.10.062

Cited by 58 publications

(24 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ammonium bicarbonate powder was sieved between 314 and 500 lm to obtain narrower particle size distribution. The particle size ratio of ammonium bicarbonate powder to lead powder is about six, which is in accord with the previous studies, in which the space holder particle size was at least 3-4 times bigger than the metal powder particle size [10][11][12]. The SEM pictures of used irregular lead and ammonium bicarbonate powder particles are shown in Fig.…”

Section: Materials and Foam Preparationsupporting

confidence: 89%

Open cell lead foams: processing, microstructure, and mechanical properties

Savacı

Yilmaz²,

Güden

2012

J Mater Sci

View full text Add to dashboard Cite

Open cell lead foams with the porosities between 48 and 74 % were prepared by means of powder metallurgical and casting routes, using ammonium bicarbonate particles, silica beads, and sodium chloride salt particles as space holder. The resulting foam samples structure closely resembled open cell foam structure: each cell had few interconnections with neighboring cells. Small-sized lead (II) fluoride precipitates were microscopically observed in the interior of cells in the foam samples prepared using silica beads as space holder, resulting from the reaction between silica and hydrofluoric acid in the space holder dissolution step. The compression stress-strain curve of foam samples prepared by powder metallurgical route showed brittle deformation behavior following the initial elastic deformation region, while the foam samples prepared by casting route showed characteristic foam deformation behavior: cell edge crushing on the bent cell walls, and cell wall tearing. The collapse stresses, densification strains, and elastic moduli of the prepared foams were further fitted with scaling relations.

show abstract

Section: Materials and Foam Preparationsupporting

confidence: 89%

Open cell lead foams: processing, microstructure, and mechanical properties

Savacı

Yilmaz²,

Güden

2012

J Mater Sci

View full text Add to dashboard Cite

show abstract

“…One of the concerns of using NaCl as a space-holder is its relatively low melting point of 801 • C. If the molten space-holder material can chemically react with an alloy, it may dissolve the alloy and can wet the alloy powders, thus preventing their densification [19]. According to a study by Bansiddhi et al [19], neither of this happens during the hot-pressing of TiNi alloy with NaCl space-holder at a temperature above 950 • C. Besides that, the shape of the pores after NaCl dissolution stays rectangular, replicating the actual shape of NaCl solid crystals [12,43,44]. The results of our experiments agree with this.…”

Section: Resultsmentioning

confidence: 99%

Mechanical and Corrosion Behavior of New Generation Ti-45Nb Porous Alloys Implant Devices

et al. 2016

View full text Add to dashboard Cite

Strategies to improve the mechanical compatibility of Ti-based materials for hard tissue implant applications are directed towards significant stiffness reduction by means of the adjustment of suitable β-phases and porous device architectures. In the present study, the effect of different compaction routes of the gas-atomized β-Ti-45Nb powder on the sample architecture, porosity, and on resulting mechanical properties in compression was investigated. Green powder compacted and sintered at 1000 • C had a porosity varying between 8% and 12%, strength between 260 and 310 MPa, and Young's modulus ranging between 18 and 21 GPa. Hot pressing of the powder without or with subsequent sintering resulted in microporosity varying between 1% and 3%, ultimate strength varying between 635 and 735 MPa, and Young's modulus between 55 and 69 GPa. Samples produced with NaCl space-holder by hot-pressing resulted in a macroporosity of 45% and a high strength of >200 MPa, which is higher than the strength of a human cortical bone. Finally, the corrosion tests were carried out to prove that the presence of residual NaCl traces will not influence the performance of the porous implant in the human body.

show abstract

“…Detailed fabrication processes of the open-celled porous Cu, influences of various processing parameters such as compacting pressure and sintering temperature on the microstructure and densification level of the resultant specimens were all presented in our previous work (Wang et al, 2010). Resultant materials exhibit uniformly distributed and interconnected pores.…”

Section: Fabrication Of the Specimensmentioning

confidence: 99%

“…The most outstanding technical advantage of SDP is that this method can achieve much wider range of structure parameters, and provide more opportunities for resultant porous metals to meet the desired behaviors. In our previous work, an open-celled porous Cu was successfully prepared via the SDP by replication of NaCl space-holders for the first time (Wang et al, 2010). Fabrication details, characterization of macroscopic and microscopic structures of the resultant porous Cu were systemically reported.…”

Section: Introductionmentioning

confidence: 99%