Lamellar Ceramic Semicrystalline‐Polymer Composite Fabricated by Freeze Casting

Huang, Jiacheng; Xü, Zhe; Moreno, Salvador; Morsali, S.R.; Zhou, Zhong; Daryadel, Soheil; Baniasadi, Mahmoud; Qian, Dong; Minary‐Jolandan, Majid

doi:10.1002/adem.201700214

Cited by 10 publications

(18 citation statements)

References 45 publications

(68 reference statements)

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“…[12,15,38] Changes in the compliance (C) was used to indirectly determine the length of the crack of the SENB sample. [12,15,38] Changes in the compliance (C) was used to indirectly determine the length of the crack of the SENB sample.…”

Section: Resultsmentioning

confidence: 99%

“…[9] Altogether, these properties seems to cooperatively function to provide the remarkable strengthtoughness of this material. [3,[11][12][13] The polymer phase in these composites are often added by vacuum infiltration. [1,10] Notable studies are those of polymer-ceramic composites and pure ceramic composites containing suspensions fabricated by freeze casting and sintering.…”

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confidence: 99%

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Bioinspired Nacre‐Like Ceramic with Nickel Inclusions Fabricated by Electroless Plating and Spark Plasma Sintering

Xü

Huang²,

Zhang

et al. 2018

Adv Eng Mater

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Hybrid composites of layered brittle-ductile constituents assembled in a brick-and-mortar architecture are promising for applications requiring high strength and toughness. Mostly, polymer mortars have been considered as the ductile layer in brick-and-mortar composites. However, low stiffness of polymers does not efficiently transfer the shear between hard ceramic bricks. Theoretical models point to metals as a more efficient mortar layer. However, infiltration of metals into ceramic scaffold is non-trivial, given the low wetting between metals and ceramics. The authors report on an alternative approach to fabricate brick-and-mortar ceramic-metal composites by using electroless plating of nickel (Ni) on alumina micro-platelets, in which Ni-coated microplatelets are subsequently aligned by a magnetic field, taking advantage of ferromagnetic properties of Ni. The assembled Ni-coated ceramic scaffold is then sintered using spark plasma sintering (SPS) to locally create Ni mortar layers between ceramic platelets, as well as to sinter the ceramic microplatelets. The authors report on materials and mechanical properties of the fabricated composite. The results show that this approach is promising toward development of bioinspired ceramic-metal composites.Many structural materials are quickly approaching their performance limits. [1] There is an unmet demand for damage-tolerant, lightweight bulk structural composites for a range of applications including transportation, infrastructure, and for applications requiring operation in extreme environments, such as high temperature and high pressure. Damage tolerance refers to the ability of a material to exhibit simultaneous strength and toughness to resist propagation of cracks.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

Bioinspired Nacre‐Like Ceramic with Nickel Inclusions Fabricated by Electroless Plating and Spark Plasma Sintering

Xü

Huang²,

Zhang

et al. 2018

Adv Eng Mater

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“…Dense composite materials may also be fabricated by infiltrating freeze-cast skeletons with a secondary phase. Thus far, ceramic/metal [52,[106][107][108][109][110][111][112][113][114][115][116][117][118][119], ceramic/polymer [120][121][122][123][124][125][126][127][128][129][130][131][132][133][134][135][136][137][138], metal/polymer [139][140][141][142][143], and metal/metal [144,145] composites have been demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Freeze casting – A review of processing, microstructure and properties via the open data repository, FreezeCasting.net

Scotti

Dunand

2018

Progress in Materials Science

287

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“…Composite's strength improved by ≈47% compared to the lamellar ceramic. The Ni phase affects the stress distribution by bearing fractions of the load and reducing the stress concentration, and hence, it increases the strength of the composite . The lamellar ceramic comprised of 100% brittle alumina platelets, hence it exhibits higher level of unpredictability in strength compared to the metal particle‐ceramic composite, which contain 18 vol% of ductile phase.…”

Section: Resultsmentioning

confidence: 99%

“…Specimens for the fracture toughness experiment and 3‐point flexure experiment were prepared by a diamond saw, followed by grinding sequentially using sand papers with grit sizes 180, 320, 600, and 4000. Notches on SENB (single‐edge notched beam) specimens were generated by a diamond saw followed by sharpening by a razor blade . Each SENB sample was further polished using a polishing cloth and 1 μm diamond suspension using a M‐Prep 5 polisher (Allied High Tech Products, Inc.).…”

Section: Methodsmentioning

confidence: 99%

Alumina–Nickel Composite Processed via Co‐Assembly Using Freeze‐Casting and Spark Plasma Sintering

et al. 2019

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A metal-ceramic composite comprised of %82 vol% alumina (Al 2 O 3 ) and %18 vol% nickel (Ni) is fabricated via co-assembly of alumina micro-platelets with Ni particles using the freeze-casting process followed by the spark plasma sintering (SPS). The SPS processing with a custom-designed temperature-pressure history result in formation of elongated Ni phase between the lamellar-ceramic phase. Results of the mechanical characterization shows that inclusion of Ni improves the flexural strength of the composite by more than 47% compared to the lamellar ceramic. Additionally, the crack initiation (K IC ) and crack growth toughness increase by 20% and 47%, respectively. The inclusion of softer Ni phase does not compromise the indentation modulus and indentation hardness of the composite compared to the pure ceramic.Inclusion of a ductile metal phase into a ceramic matrix can improve its fracture toughness, in addition to other possible desirable properties such as electrical conductivity. [1][2][3] Such metal-ceramic composites have applications and market demand in various industries including automotive, aerospace, oil, and defense, in products such as high performance wearresistance parts, cutting tools, light-weight structural composites, and aero-engine components. [4,5] Metal inclusion can be either in the form of randomly distributed particles, layered (lamellar), or nature-inspired brickand-mortar architecture. Based on the desired structure, there are various processes for preparation of metal-ceramic composites. They include (but not limited to) stir-casting, tape-casting and tape-sintering, squeeze-casting, thermal spraying of multilayered ceramic-metal, hot pressing, freeze-casting, and spark-plasma sintering, among others. [1][2][3][5][6][7][8][9] In certain cases, a combination of these processes is used to fabricate the metal-ceramic composite. Often it is desired that the metal phase to have small volume percentage to achieve a good balance of strength and toughness in the composite. [10] This requirement imposes further processing challenges, in particular for lamellar and brick-and-mortar architecture, since the pore size to be filled with metal mortar is small.The overall toughening mechanism of metal inclusion into ceramic is believed to be a combination of several factors including (but not limited to) energy dissipation associated with the plastic deformation of the metal phase, crack tip blunting, deflection of the crack at the metal-ceramic interface, and reduction of stress concentration by distribution of the crack to a larger area. [1][2][3] In the case of lamellar and brick-and-mortar architecture, the ductile metal phase can also function similar to a lubricant, which relieves stress concentration by allowing for limited sliding. The ductile metal phase may also provide crack bridging as an extrinsic crack-tip shielding mechanism. [7,11] These mechanism overall are manifested in the form of a rising R-curve behavior.In several early works alumina-Ni composites have been reported, in which ...

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Lamellar Ceramic Semicrystalline‐Polymer Composite Fabricated by Freeze Casting

Cited by 10 publications

References 45 publications

Bioinspired Nacre‐Like Ceramic with Nickel Inclusions Fabricated by Electroless Plating and Spark Plasma Sintering

Bioinspired Nacre‐Like Ceramic with Nickel Inclusions Fabricated by Electroless Plating and Spark Plasma Sintering

Freeze casting – A review of processing, microstructure and properties via the open data repository, FreezeCasting.net

Alumina–Nickel Composite Processed via Co‐Assembly Using Freeze‐Casting and Spark Plasma Sintering

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