HIGHLY POROUS STRONG CERAMIC MATERIAL
MADE FROM POWDER PREPARED BY CHEMICAL DISPERSION
OF ALUMINUM ALLOY CONTAINING LITHIUM
Yu. G. Trifonov,
A. D. Shlyapin,
A. Yu. Omarov,
and V. P. Tarasovskii
Translated from Novye Ogneupory, No. 4, pp. 53 – 55, April 2015.
Original article submitted September 22, 2014.
It is shown that chemical dispersion may be used to prepare powder with prescribed particle morphology.
Computer modeling of ceramic structure makes it possible to predict its properties. Ceramic material is ob
tained with 43 – 45% open porosity and ultimate strength in bending of 60 – 65 MPa.
Keywords: chemical dispersion, aluminum-lithium alloy, porous ceramic, lamellar powder, alloyed
Previously [1, 2] features have been described in detail
for aluminum hydroxide powder, forming as a result of
chemical dispersion of aluminum alloys. It has been demon-
strated that chemical dispersion may be used to prepare pow-
der exhibiting unique phase composition and original parti-
cle and agglomerate morphology. A detailed description of
aluminum hydroxide powder forming as a result of chemical
dispersion of aluminum alloy B-1469 containing lithium has
been described . On the basis of this research it has been
demonstrated that powder has a special lamellar structure.
Powder plates are 1.0 – 1.5 nm thick, and the greatest linear
dimension of plates is 0.2 – 0.5 mm. Powder of this particle
morphology has been prepared for the first time. Particles of
lamellar-shaped powder may form different types of
microstructure during preparation of ceramic materials from
them. The present work is a study of ceramic material made
from powder prepared previously by the procedure provided
The original aluminum hydroxide powder was prepared
by chemical dispersion of aluminum turnings containing lith-
ium. In order to prepare 200 g of powder for study 150 g of
aluminum turnings and 850 ml of 2 M NaOH solution were
used. As a result of exothermic reaction occurring between
aluminum turnings and alkali solution a deposit of alloyed
aluminum hydroxide formed. The deposit was washed re
Refractories and Industrial Ceramics Vol. 56, No. 2, July, 2015
1083-4877/15/05602-0201 © 2015 Springer Science+Business Media New York
FGUP IREA State Order of the Red Banner Scientific Research
Institute of Chemical Reagents and Especially Pure Chemical
Substances, Moscow, Russia.
FGBOU VPO Moscow State Industrial University, Moscow, Rus
ZAO NTTs Bakor, Shcherbinka, Moscow, Russia.
Fig. 1. Original powder microstructure after drying at 70°C.