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M. Tenerowicz-Zaba, M. Kupkova, M. Kabatova, E. Dudrova, M. Dzupon and M. Sulowski
D. Rodziňák, J. Čerňan and V. Puchý
The article deals with the effect of porosity on the contact fatigue of sintered material type Astaloy CrL with 0.3 and 0.4% C. Sets of samples were used with densities beginning from the value of 7000 kg.m−3 to the value of almost 7859 kg.m−3 which represents almost zero porosity (compact material). It has been found out that the increase of compacting pressure applied simultaneously with temperature results in the reduction of porosity from the value of 9.10% to 0.0005% and increase in hardness from 145 to 193 HV10, depending on the carbon content. Logically there is also an increase in the fatigue life by the contact fatigue tests for the value of 50×106 cycles from the value of 900 MPa to 1150 MPa for samples with 0.3% of C and from 900 MPa to 1300 MPa for samples with 0.4% C. These investigations were also carried out in the past, but to achieve the reduction of porosity, different technonologies were used at each level such as double pressing, hot pressing, saturation, hot forging, etc. In this case, the single technology of “spark plasma sintering” making use of compacting at high temperatures is capable to continuously reduce porosity to zero.
P. Oslanec and M. Škrobian
Mezbahul-Islam, Ahmad Omar Mostafa, Mamoun Medraj Hindawi: Journal of Materials, vol. 2014, Article ID 704283 http://dx.doi.org/10.1155/2014/704283  Pieczonka, T., Schubert, T., Baunack, S.: Sintering Behaviour of Aluminium in Different Atmospheres  Chua, AS., Brochu, M., Bishop, DP.: Spark plasma sintering of prealloyed aluminium powders  Czerwinski, F.: JOM, May, 2004  Krasovskii, PV.: Inorganic materials, vol. 50, 2014, p.1480, DOI: 10.1134/S0020168514150059  Colombo, A.: Analytica Chimica Acta, vol. 81, 1976, p. 397
Ileana Nicoleta Popescu, Ruxandra Vidu and Vasile Bratu
. Titanium with aligned, elongated pores for orthopedic tissue engineering applications, In: Journal of Biomedical Materials Research Part A, 84A (2) (2008) 402-412.  Y. Zhao, M. Taya, Y. Kang, A. Kawasaki, Compression behavior of porous NiTi shape memory alloy, Acta Mater. 53 (2005) 337–343.  A. Dudek, M. Klimas, Composites based on titanium alloy Ti-6Al-4V with an addition of inert ceramics and bioactive ceramics for medical applications fabricated by spark plasma sintering (SPS method), In: Materialwissenschaft Und Werkstofftechnik, 46 (3) (2015) 237