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May 1926 |
Martensite is body-centered tetragonal
W. Fink and E.D. Campbell, using X-ray measurements, show
that martensite is body-centered tetragonal.
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Jan 19, 1927 |
Measurements of stressed tensile samples of aluminum
R.L. Aston reports measurements of stressed tensile samples
of aluminum showing that the strain indicated by relative
changes in lattice orientation is less near grain
boundaries than within the grain.
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Sep 29, 1926 |
Metallic beryllium-alkali double fluorides prepared
W. Kroll prepares metallic beryllium-alkali double
fluorides by an alkali earth-metal (magnesium or lithium)
at temperatures about above 1000 degrees C.
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Apr 01, 1922 |
Method for preparing cellulose ethers is patented
L. Lilienfeld patents a method for the preparation of
cellulose ethers
and notes their possible use as adhesives.
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Apr 21, 1925 |
Method to obtain 99.8% pure Al devised
William Hoopes, Alcoa, devises a method of obtaining
aluminum at least 99.8% pure by electrolytic refining.
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Aug 28, 1917 |
New airplane varnish
S.E. Graves and T.W.H. Ward devise a varnish for airplanes
consisiting
of a solution of cellulose ester and acetone.
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Oct 30, 1923 |
New aluminum alloy (51S) described
R.S. Archer and Z. Jeffries, Alcoa, describe an aluminum
alloy (51S) with approximately 4.4% copper, 0.8% silicon
and 0.75% manganese, improvable as to strength and hardness
by heating to about 500 degrees C, quenching, and aging at
120-160 degrees C.
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Feb 09, 1926 |
New aluminum alloy developed
R.L. Johnston, R.G. Archer, and Z. Jeffries, Alcoa, develop
an aluminum alloy, adapted for chill-casting, which
contains 3-10% silicon, 2-5% copper, and 15% or less zinc.
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1929 |
New developments in nickel alloys
B.E. Field, Union Carbide, describes new developments in
nickel-molybdenum-iron, nickel-silicon, and nickel-aluminum
alloys of high corrosion resistance, the first two showing
good high-temperature properties.
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Nov 27, 1917 |
New material to join woodwork
Hydrolyzed starch mixed with alum and sodium hydroxide to
form sodium
aluminate in the starch is used to join woodwork or
veneering,
according to a patent issued to R.W. Tunnell.
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Jun 01, 1956 |
New process for producing high-purity chromium
M.C. Carosella and J.D. Mettler, Electro Metallurgical Co.,
describe a new process for producing high-purity chromium
from high-carbon ferrochromium (obtained from an electric
furnace) and 99.8% chromium electrodeposited in diaphragm
cells from a chromium-alum solution.
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Oct 19, 1921 |
New transparent adhesive
Formaldehyde condensation products with carbamide or its
derivatives,
prepared by H. John, are described as good, transparent
adhesives,
usable for joining glass, metals, and other materials or as
a laquer
for coating airplane wings or other fabrics.
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Oct 28, 1920 |
New varnish for airplane fabrics
D.M. Sutherland forms a varnish for airplanes fabrics of 6-
12 parts
acetylcellulose, 36-44 parts acetone, 24 parts benzene, 24-
25 parts
"borated benzen," and 2-3 parts benzyl alcohol.
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Jul 03, 1928 |
Nickel alloy for high-speed tools patented
R. Franks and B.E. Field, Haynes Stellite Company, receive
a patent for a nickel alloy comtaining 3-5% aluminum, 3.5-
6% silicon, 5-12% tungsten, 6-12% zirconium, and 1% or less
boron, described as suitable for high-speed tools.
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Sep 11, 1928 |
Nickel alloy for high-speed tools patented
R. Franks and B.E. Field, Haynes Stellite Company, receive
a patent for a nickel alloy suitable for high-speed tools
and containing 3-5% aluminum, 3.5-6% silicon, 5-12%
tungsten, 6-12% titanium, and up to 1% boron.
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Nov 01, 1929 |
Nickel-chromium alloys
P. Chevenard shows that small additons of aluminum or
titanium make nickel-chromium alloys responsive to thermal
treatment.
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Apr 14, 1925 |
Nickel-copper alloys obtained
R.C. Stanley, International Nickel, obtains nickel-copper
alloys (of the Monel type) by roasting a nickel-copper
material, the product being subjected to a melting
temperature with a sulphur-removing slag in a basic-lined
electric furnace.
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Oct 15, 1986 |
Nobel announcement of 1986 Physics prize
On 15 October 1986, the Swedish Royal Academy of Sciences
issued a press release announcing that Gerd Binnig and Heinrich
Rohrer of IBM Zurich had won one half of that year's Nobel
Prize for physics for their invention of the Scanning
Tunneling Microscope.
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Aug 01, 1929 |
Nonmonomeric ester preparation
W.H. Carothers and J.A. Arvin list some nonmonomeric esters
(polymers) prepared by heating the acid and 5% excess of
the glycol for about 3 hours at 795-185 degrees C and then
at 200-250 degrees C and 0.2 mm for 3 hours.
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Jun 01, 1920 |
Oleic acid can lower coefficient of friction
Irving Langmuir demonstrates that a monolayer of oleic acid
is
sufficient to lower the coefficient of friction of rubbing
solids to
only 0.1.
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