The sinterability of chromium powder
Chromium compacts with a porosity suitable for filtering applications can be obtained by pressing the starting powder with an addition of 4% paraffin wax.
Firm packing of specimens in a fine alumina filling material protects the chromium against oxidation during sintering in moderately dried hydrogen.
During the sintering of chromium with a paraffin-wax addition to the charge, the rate of heating to the isothermal holding temperature may exert a substantial influence on the shrinkage of compacts.
During the sintering of chromium with a paraffin wax addition to the charge, the sintering process may become activated as a result of the reduction of oxides by the carbon black formed, leading to increased shrinkage compared with pure chromium.
Both pure chromium and chromium with a paraffin wax addition to the charge exhibit good sinterability at temperatures of 1373–1473°K.
KeywordsOxidation Alumina Porosity Chromium Shrinkage
Unable to display preview. Download preview PDF.
- 1.B. A. Borok, R. P. Shchegoleva, L. S. Golubeva, B. P. Lobashev, and V. I. Zheleznyak, Preparation and Application of Chromium Powder to the Manufacture of Sintered Parts [in Russian], TsITÉIN (1961), No. 5.Google Scholar
- 2.R. A. Andrievskii and S. M. Solonin, Poroshkovaya Met., 3, 32 (1964).Google Scholar
- 3.A. M. Samarin and A. A. Vertman, Tr. Inst. Met. im. Baikova, 1, 60 (1957).Google Scholar
- 4.G. V. Samsonov and T. Ya. Kosolapova, Zh. Prikl. Khim., 12, 34 (1961).Google Scholar
- 5.A. Sully, Chromium [Russian translation], Moscow, Metallurgizdat (1958).Google Scholar
- 6.G. V. Samsonov, Refractory Compounds [in Russian], Moscow, Metallurgizdat (1963).Google Scholar