B2 Grain Growth Behavior of a Ti-22Al-25Nb Alloy Fabricated by Hot Pressing Sintering

Jia, Jianbo; Li, Wenchao; Xu, Yan; Chen, Chen; Yue, Yang; Luo, Junting; Zhang, Kaifeng

doi:10.1007/s11665-018-3353-3

Cited by 6 publications

(7 citation statements)

References 20 publications

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“…Relying on the above model and experimental data taken by Jia, it is observed that the Beck equation and the data coincide temporally [63]. The alloy studied was Ti22Al25Nb, initially treated with 1050°C under a pressure of 35MPa and for 1h, the structural analysis was performed with temperatures between 1010 C and 1110 C, with residence times of 10, 30 min, 1, 2 and 3 hours.…”

Section: Densification By Hot Pressingmentioning

confidence: 89%

“…The furnace, Figure 8, consists of a heater that produces high temperature, a thermal barrier that keeps the inside of the furnace at high temperature and a temperature control system; PIC furnaces use a combination of the heat transfer types, conduction, convection and radiation, where the gas has a low conductivity, resulting in the sample not being significantly heated by the gas [24]. Powders contained in glass or metal vessels that determine the shape of the sample for hot-press densification allowed finding a model in which grain growth occurs by grain boundary migration where, as in the conventional method, it is mediated by atomic diffusion, interfacial reaction and by the activation energy related to the temperature and residence time of the sample [63].…”

Section: Densification By Hot Pressingmentioning

confidence: 99%

“…Where D is the average grain size measured in m, D0 is the average initial grain size of the sample, t is the residence time, k1 is the material constant and n is the grain growth exponent [63], [64]. The coefficients n and k1 can be calculated, experimentally, by ratifying equation ( 8)…”

Section: Densification By Hot Pressingmentioning

confidence: 99%

“…Diagram of the furnace used for heating at PUC Source: [24] The experimentally calculated values were found to fit the theoretical data adequately. Jia also analyzed the relationship between the average grain size and temperature at a given time and is described by the Hillert equation ( 9) [63].…”

Section: Densification By Hot Pressingmentioning

confidence: 99%

“…Where Q is the activation energy, R the gas constant and T the temperature; the activation energy and the material constant k2 are obtained from equation ( 9) [63].…”

Section: Densification By Hot Pressingmentioning

confidence: 99%

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Review: Densification process of ceramic materials

2020

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Ceramics has played an important role in the technological and socio-economic development of humanity, so that they can be used to identify different historical periods of the humanity. Babylonians, Greek, Andalusian, among other cultures have used the ceramics and developed several methods to improve the products obtained by pottery. Generally, the ceramics can be divided into two big areas, traditional and structural ceramics. Ceramics manufactured with clay, Traditional Ceramics, currently they are being studied in the improvement of structural, abrasives, cement, refractory, among other materials. On the other hand, the ceramics developed as a result of new technologies and the exploitation of natural resources, Structural Ceramics, they are a great interest for the science of ceramic materials due to the development of ceramics with properties that incorporate attributes of various materials in only one material, in addition to the contributing to the phenomenological study at a scientific level. Advances in the processes of densification and doping of these materials have allowed to obtain ceramics with high mechanical resistance, high hardness, high resistance to attrition and corrosion, good chemical and thermal stability; features that have directly influenced the type of applications such as bulletproof vests, transparent shields, high temperature electrical insulators, superconducting devices, electronic materials among other applications

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Section: Densification By Hot Pressingmentioning

confidence: 89%

Section: Densification By Hot Pressingmentioning

confidence: 99%

Section: Densification By Hot Pressingmentioning

confidence: 99%

Section: Densification By Hot Pressingmentioning

confidence: 99%

“…Where Q is the activation energy, R the gas constant and T the temperature; the activation energy and the material constant k2 are obtained from equation ( 9) [63].…”

Section: Densification By Hot Pressingmentioning

confidence: 99%

See 3 more Smart Citations