Fabrication and mechanical properties of powder metallurgy tantalum prepared by hot isostatic pressing

Kim, Youngmoo; Kim, Eun Pyo; Noh, Joon-Woong; Lee, Sung Ho; Kwon, Young−Soo; Oh, In Seok

doi:10.1016/j.ijrmhm.2014.09.012

Cited by 32 publications

(8 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…e high-temperature contact of the Ta-based powders with the graphite die and the punches leads to the diffusion of carbon and the Ta-40ZrO 2 Ta-5TaC Ta-10TaC Ta-20TaC Ta-40TaC Composite composition 8 Advances in Materials Science and Engineering formation of tantalum carbides, which was also observed by other authors [27]. e nanocomposites (composed of refractory tantalum as the metal matrix with the embedded refractory ceramic phase such as Y 2 O 3 , ZrO 2 , and TaC) have very high mechanical properties, particularly the nanocrystalline Ta-TaC materials, which are promising in terms of heavy load conditions.…”

Section: Discussionsupporting

confidence: 63%

Formation and Properties of the Ta‐Y₂O₃, Ta‐ZrO₂, and Ta‐TaC Nanocomposites

Jakubowicz

Sopata

Adamek

et al. 2018

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

e nanocrystalline tantalum-ceramic composites were made using mechanical alloying followed by pulse plasma sintering (PPS). e tantalum acts as a matrix, to which the ceramic reinforced phase in the concentration of 5, 10, 20, and 40 wt.% was introduced. Oxides (Y 2 O 3 and ZrO 2 ) and carbides (TaC) were used as the ceramic phase. e mechanical alloying results in the formation of nanocrystalline grains. e subsequent hot pressing in the mode of PPS results in the consolidation of powders and formation of bulk nanocomposites. All the bulk composites have the average grain size from 40 nm to 100 nm, whereas, for comparison, the bulk nanocrystalline pure tantalum has the average grain size of approximately 170 nm. e ceramic phase refines the grain size in the Ta nanocomposites. e mechanical properties were studied using the nanoindentation tests. e nanocomposites exhibit uniform load-displacement curves indicating good integrity and homogeneity of the samples. Out of the investigated components, the Ta-10 wt.% TaC one has the highest hardness and a very high Young's modulus (1398 HV and 336 GPa, resp.). For the Ta-oxide composites, Ta-20 wt.% Y 2 O 3 has the highest mechanical properties (1165 HV hardness and 231 GPa Young's modulus).

show abstract

Section: Discussionsupporting

confidence: 63%

Formation and Properties of the Ta‐Y₂O₃, Ta‐ZrO₂, and Ta‐TaC Nanocomposites

Jakubowicz

Sopata

Adamek

et al. 2018

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

show abstract

“…For this, various techniques have emerged depending on the way of heating the powder. These techniques include natural sintering also called conventional sintering (using an oven as a heating source) [7,9,10] and nonconventional sintering such as microwave sintering (irradiation by a microwave field), [9,11] sintering under load (compaction hot uniaxial or hot isostatic pressing), [12,13] flash sintering also called SPS (applying a uniaxial pressure and an electric current), [14][15][16] and laser sintering (scan a powder bed by a laser beam). [17,18] In the literature, many works have been presented to determine experimental parameters during sintering.…”

Section: Introductionmentioning

confidence: 99%

Determination of porosity from shrinkage curves during sintering of granular materials

et al. 2017

View full text Add to dashboard Cite

This paper investigates the implementation of an analytical model to determine the porosity of a granular material during reactive and nonreactive sintering. A graphical interpretation of this model is proposed to calculate the porosity by comparing the experimental shrinkage curve with the ideal one. For the nonreactive sintering, some examples have been taken from the literature to illustrate the application of this method for two granular materials (alumina and zircon). In the case of reactive sintering, we have used our experiments to study the sintering behavior of magnesium hydroxide. The shrinkage curve was determined by dilatometer and the porosity was measured by helium pycnometer. The comparison revealed that the porosity calculated from the model is fully consistent with the porosity measurements in the both cases.

show abstract

“…D 90 shows that the powder size smaller than the D 90 corresponding size accounts for 90%. e small powders with high surface energy are prone to be contaminated, resulting in a high oxygen content [13].…”

Section: Methodsmentioning

confidence: 99%

Effect of Powder Size on Microstructure and Mechanical Properties of 2A12Al Compacts Fabricated by Hot Isostatic Pressing

Huang

Wang

et al. 2018

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

This paper studied the effects of powder size on densification, microstructure, and mechanical properties of the hot isostatic-pressed 2A12 aluminum alloy powder compact. The results show that the near-fully dense powder compact can be successfully achieved and the smaller the powder is, the higher the relative density is. In addition, as the powder size decreases, the precipitated phases in the powder compact change from continuously point-like distribution at the junctions among powder particles to the concentrated distribution at the three-way intersections. Compared with the large powder, the tensile strength, yield strength, and elongation of the compact with the small powder were improved by 14%, 30.8%, and 48.6%, respectively.

show abstract

Fabrication and mechanical properties of powder metallurgy tantalum prepared by hot isostatic pressing

Cited by 32 publications

References 6 publications

Formation and Properties of the Ta‐Y₂O₃, Ta‐ZrO₂, and Ta‐TaC Nanocomposites

Formation and Properties of the Ta‐Y₂O₃, Ta‐ZrO₂, and Ta‐TaC Nanocomposites

Determination of porosity from shrinkage curves during sintering of granular materials

Effect of Powder Size on Microstructure and Mechanical Properties of 2A12Al Compacts Fabricated by Hot Isostatic Pressing

Contact Info

Product

Resources

About

Fabrication and mechanical properties of powder metallurgy tantalum prepared by hot isostatic pressing

Cited by 32 publications

References 6 publications

Formation and Properties of the Ta‐Y2O3, Ta‐ZrO2, and Ta‐TaC Nanocomposites

Formation and Properties of the Ta‐Y2O3, Ta‐ZrO2, and Ta‐TaC Nanocomposites

Determination of porosity from shrinkage curves during sintering of granular materials

Effect of Powder Size on Microstructure and Mechanical Properties of 2A12Al Compacts Fabricated by Hot Isostatic Pressing

Contact Info

Product

Resources

About

Formation and Properties of the Ta‐Y₂O₃, Ta‐ZrO₂, and Ta‐TaC Nanocomposites

Formation and Properties of the Ta‐Y₂O₃, Ta‐ZrO₂, and Ta‐TaC Nanocomposites