Sintering and Microstrusture of Al2O3 and Al2O3-ZrO2 Ceramics

Pulgarín, Heidy Lorena Calambás; Albano, María P.

doi:10.1016/j.mspro.2015.04.062

Cited by 18 publications

(8 citation statements)

References 11 publications

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“…One of the case material couple simulated using Ansys software is CoCr alloy and Ti6Al4V for cup and femoral head component, respectively. However, the concern of (Anderson et al, 2004;Pulgarin and Albano, 2015) 380,000 0.26 500-1,700 2 CoCr (Al Jabbari, 2014;Puccio and Mattei, 2015) 230,000 0.3 280-380 3 SS316L (Yildiz et al, 2011;Naik et al, 2020) 200,000 0.3 190 4 UHMWPE (Puccio and Mattei, 2015;Hussain et al, 2020) 1,000 0.4 4-6 this research is not in MoM materials, where it investigated mixed material couples. The last conclusion showed that least wear when using the CoCr alloy on the ultra-high molecular weight polyethylene (UHMWPE) material.…”

Section: Introductionmentioning

confidence: 97%

Reducing Contact Stress of the Surface by Modifying Different Hardness of Femoral Head and Cup in Hip Prosthesis

et al. 2021

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The wear of hip prosthesis due to applied load and sliding distance during the patient's daily activity cannot be avoided. Wear causes osteolysis or metallosis due to the wear debris produced by the wear process. Several methods were used to reduce wear in metal-on-metal hip prostheses. One of the efforts performed to reduce wear was the differential-hardness concept. Based on the literature, the fine surface roughness of the femoral head are the reason why the hip prosthesis with differential-hardness reduces wear. Besides, the differential-hardness will contribute to the difference of modulus elasticity then influenced the contact stress on the surface contact. According to Archard's wear law, wear on the material pair is affected by contact stress. Therefore, the analysis of contact stress on the hip prosthesis with differential-hardness is important to investigate. The investigation performed by the static contact of two-dimensional axisymmetric with frictionless by using finite element simulation. The simulated models are the alumina vs. alumina, alumina vs. SS316L, CoCr vs. CoCr, CoCr vs. SS316L, and SS316L vs. UHMWPE. The purpose of this study is to determine the contact stress on the surface contact due to differential-hardness of the femoral head and cup. The results of simulations show that the differential-hardness marked by differences in the modulus of elasticity can reduce the contact stress on the surface contact if compare with the similar hardness.

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Section: Introductionmentioning

confidence: 97%

Reducing Contact Stress of the Surface by Modifying Different Hardness of Femoral Head and Cup in Hip Prosthesis

et al. 2021

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“…Comparing the two types of materials, the Al 2 O 3 samples exhibited higher hardness than the Al 2 O 3 /ZrO 2 samples. These results can be attributed to the higher hardness of Al 2 O 3 than that of ZrO 2 4,41 . If the two sintering techniques are considered, microwave hybrid sintering results in higher hardness than conventional sintering.…”

Section: Resultsmentioning

confidence: 99%

“…These results can be attributed to the higher hardness of Al 2 O 3 than that of ZrO 2 . 4,41 If the two sintering techniques are considered, microwave hybrid sintering results in higher hardness than conventional sintering. Although MS A + Z contained a less hard zirconia phase, it still exhibited higher hardness than CS A, which contained only the harder Al 2 O 3 phase.…”

Section: F I G U R E 6 X-ray Diffraction (Xrd) Analysis Of (A) Cs a (...mentioning

confidence: 99%

“…The development of Al 2 O 3 matrix composites is one of the most promising alternatives for improving the brittleness and reliability of Al 2 O 3 components. Among these composites, tetragonal zirconia‐added alumina (Al 2 O 3 /ZrO 2 ) composites are used to protect against wear, thermal shock, and catastrophic failure in manufacturing inserts, prosthesis parts, dental screws, dies, gears, turbine housings, cutting tools, body armor, and pump components 4–6 . These composites are some of the most widely used ceramics.…”

Section: Introductionmentioning

confidence: 99%

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Microwave hybrid and conventional sintering of Al₂O₃ and Al₂O₃/ZrO₂ multilayers fabricated by aqueous tape casting

et al. 2023

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In this study, microwave hybrid sintering and conventional sintering of Al2O3‐ and Al2O3/ZrO2‐laminated structures fabricated via aqueous tape casting were investigated. A combination of process temperature control rings and thermocouples was used to measure the sample surface temperatures more accurately. Microwave hybrid sintering caused higher densification and resulted in higher hardness in Al2O3 and Al2O3/ZrO2 than in their conventionally sintered counterparts. The flexural strength of microwave‐hybrid‐sintered Al2O3/ZrO2 was 70.9% higher than that of the conventionally sintered composite, despite a lower sintering temperature. The fracture toughness of the microwave‐hybrid‐sintered Al2O3 increased remarkably by 107.8% despite a decrease in the relative density when only 3 wt.% t‐ZrO2 was added. The fracture toughness of the microwave‐hybrid‐sintered Al2O3/ZrO2 was significantly higher (247.7%) than that of the conventionally sintered composite. A higher particle coordination and voids elimination due to the tape casting and the lamination processes, the microwave effect, the stress‐induced martensitic phase transformation, and the grain refinement phenomenon are regarded as the main reasons for the mentioned outcomes.

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“…In one technique, the gradient structure is formed sequentially and layer by layer; in the other, by sintering a multilayer sample. The first type includes selective sintering by an electron or laser beam [12,13]; the second type includes hot pressing and microwave and spark plasma sintering [14][15][16]. The advantage of forming the gradient structure in a sequential and layer-by-layer manner is the possibility of creating samples of complex shape, although with greater porosity [17].…”

Section: Introductionmentioning

confidence: 99%

Electron Beam Sintering of Composite Al2O3-ZrO2 Ceramics in the Forevacuum Pressure Range

et al. 2022

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We describe our investigations of electron beam sintering of multilayer ZrO2-Al2O3 composite ceramics in the forevacuum pressure range (~30 Pa). To generate the electron beam, a plasma-cathode electron source operating in the forevacuum pressure range was used; this kind of source provides the capability of direct processing of non-conducting materials. We studied the effect of electron beam sintering on the temperature drop with sample depth for different layer thicknesses and determined the optimal layer thickness to ensure minimal temperature drop. We show that in order to minimize the temperature difference and improve the sintering, it is necessary to take into account the thermophysical parameters of the sintered materials. Forming a layered structure taking into account the coefficient of thermal conductivity of the layer materials allows a reduction in the temperature gradient by 150 °C for samples of 3 mm thickness.

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Sintering and Microstrusture of Al2O3 and Al2O3-ZrO2 Ceramics

Cited by 18 publications

References 11 publications

Reducing Contact Stress of the Surface by Modifying Different Hardness of Femoral Head and Cup in Hip Prosthesis

Reducing Contact Stress of the Surface by Modifying Different Hardness of Femoral Head and Cup in Hip Prosthesis

Microwave hybrid and conventional sintering of Al₂O₃ and Al₂O₃/ZrO₂ multilayers fabricated by aqueous tape casting

Electron Beam Sintering of Composite Al2O3-ZrO2 Ceramics in the Forevacuum Pressure Range

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Sintering and Microstrusture of Al2O3 and Al2O3-ZrO2 Ceramics

Cited by 18 publications

References 11 publications

Reducing Contact Stress of the Surface by Modifying Different Hardness of Femoral Head and Cup in Hip Prosthesis

Reducing Contact Stress of the Surface by Modifying Different Hardness of Femoral Head and Cup in Hip Prosthesis

Microwave hybrid and conventional sintering of Al2O3 and Al2O3/ZrO2 multilayers fabricated by aqueous tape casting

Electron Beam Sintering of Composite Al2O3-ZrO2 Ceramics in the Forevacuum Pressure Range

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Microwave hybrid and conventional sintering of Al₂O₃ and Al₂O₃/ZrO₂ multilayers fabricated by aqueous tape casting