Fabrication of ZrB2–Zr cermet using laser sintering technique

Sun, Chen-Nan; Baldridge, Tyson; Gupta, Mool C.

doi:10.1016/j.matlet.2009.08.059

Cited by 31 publications

(15 citation statements)

References 17 publications

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“…Note that this paper focuses only on the thermophysical properties of the Zr–ZrB 2 cermets. Results on oxide formation and microstructural and chemical characterization of this material can be found in Sun et al , 13 and C.‐N. Sun et al , unpublished data.…”

Section: Resultsmentioning

confidence: 85%

“…Layer thickness was generally between 100 and 500 μm for building multilayer samples. Experimental setup can be found in Sun et al 13 The bulk density was determined by measuring the dimensions and weight of the specimen.…”

Section: Methodsmentioning

confidence: 99%

“…The addition of sintering aids has been used to improve the densification 8–10 . In addition, solid freeform fabrication (SFF) techniques 11–16 have been studied extensively in order to create complex structures directly from ceramic powder materials layer by layer. Among SFF techniques, laser sintering may hold an edge because it is cost‐effective and can process a wide variety of materials 17,18 .…”

Section: Introductionmentioning

confidence: 99%

“…We have reported the fabrication of Zr–ZrB 2 cermets using laser sintering technique 13 . Metal Zr was chosen as a binder due to its (1) relatively lower density (6.49 g/cm 3 ) among refractory metals; (2) relatively high melting temperature of 1857°C; (3) good match of the coefficient of thermal expansion (CTE) with ZrB 2 .…”

Section: Introductionmentioning

confidence: 99%

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Thermophysical Properties of Laser-Sintered Zr-ZrB2 Cermets

Sun

Gupta

Porter

2011

Journal of the American Ceramic Society

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Thermophysical properties between 293 and 1863 K were investigated for laser-sintered Zr-ZrB 2 cermets containing 30, 50, and 70 wt% Zr. The measured values of coefficient of thermal expansion of Zr-ZrB 2 cermets were larger than the predicted values due to the effect of Zr-O solid solution, which was formed during laser sintering. The order-disorder phase transition of Zr-O solid solution resulted in the sharp increase in heat capacity between 625 and 675 K. Thermal conductivities were calculated from measured densities, heat capacities, and thermal diffusivities. Thermal diffusivities at 473 K were 14.0, 12.2, and 8.0 mm 2 /s for 30Zr-ZrB 2 , 50Zr-ZrB 2 , and 70Zr-ZrB 2 , respectively. Thermal conductivities at 473 K were 38, 31, and 20 W . (m . K) À1 for 30Zr-ZrB 2 , 50Zr-ZrB 2 , and 70Zr-ZrB 2 , respectively. Electron contribution to thermal conductivity of the 70Zr-ZrB 2 cermet was determined using electrical resistivity measurements, which shows that total thermal conductivity mostly came from the electron contribution at high temperatures (1073-1473 K) while the phonon contribution was very small.

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Section: Resultsmentioning

confidence: 85%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thermophysical Properties of Laser-Sintered Zr-ZrB2 Cermets

Sun

Gupta

Porter

2011

Journal of the American Ceramic Society

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“…In literature, laser sintering has been described for sintering of refractory ceramics such as ZrB 2 aimed for super high temperature applications [22]. By adding 30-50% Zr metal as a binder, ZrB 2 -Zr cermets with densities >95% of theoretical density (TD) and micro-hardness values up to 16.0 GPa have been obtained [23].…”

Section: Extreme Temperatures Achieved By Lasermentioning

confidence: 99%

Laser sintering of ceramics

Qian

Shen

2013

Journal of Asian Ceramic Societies

134

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The progress of laser sintering of ceramics is reviewed by focusing on the principles and the potentials of this new technique as one member of a family of additive manufacturing technologies. After a brief introduction of the technology and the interaction between laser beam and ceramics, the characters of laser sintered ceramics are discussed in detail. The unique opportunities of achieving hierarchically structured heterogeneities and non-equilibrium phase assemblages in bulk ceramics are illustrated. It reveals that the laser sintering is not only a feasible technology allowing net shape production of customized 3D parts in a single manufacturing operation but also a promising way for developing ceramics with structures that can hardly be made by conventional processing methods.

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