 |
   |
|
|
|
|
|
|
|
|
 |
 |
|
|
|
|
|
Dec 1927 |
Demonstration that a lattice will diffract an electron beam
C. Davisson and L.H. Germer, Bell Telephone Laboratory,
demonstrate that a lattice will diffract an electron beam,
a discovery which greatly augments diffraction methods for
the determination of lattice structure. Davisson later
receives Nobel Prize for his work.
add a comment |
|
|
|
|
|
|
Apr 1928 |
Differentiation between true hysteresis and elastic after-effect
L. Prandtl differentiates between true hysteresis and
elastic after-effect, and also postulates the existence of
what us now known as an edge or line of dislocation.
add a comment |
|
|
|
|
|
|
Jul 16, 1917 |
Dope for fabrics for balloons and aircraft purposes
A. Flatters' dope for fabrics for balloons and other
aircraft purposes
is made of the following: casein, borax, soap, glycerol and
water.
When dry, a coating composed of a solution of commercial
anime gun is
applied as a fireproof finish.
add a comment |
|
|
|
|
|
|
1921 |
Ductility of molybdenum shown temperature-sensitive
W.P. Sykes demonstrates that the ductility of molybdenum is
very
temperature-sensitive, an abrupt transition from ductile to
brittle
taking place near room temperature, depending markedly on
the thermal
and mechanical history of the sample.
add a comment |
|
|
|
|
|
|
Apr 01, 1928 |
Duralumin sheet studied
Duralumin sheet quenched in hot water has greater
susceptibility to intercrystalline attack than when
quenched in cold water, according to research done by H.S.
Rawdon.
add a comment |
|
|
|
|
|
|
Nov 01, 1923 |
Effect of local deformation strain on metal suggested
H.J. Gough and D. Hanson suggest that local deformation
strain hardens metal locally and initiates fracture when
some limiting value is reached.
add a comment |
|
|
|
|
|
|
Feb 01, 1928 |
Electrostatic forces of attraction between particles
In investigating the nature of cohesion, J.E. Lennard-Jones
and B.M. Dent quantitatively analyze the electrostatic
forces of attraction between particles.
add a comment |
|
|
|
|
|
|
Jun 08, 1922 |
Ethyl derivatives of cellulose prepared
L. Lilienfeld prepares ethyl derivatives of cellulose
soluble in water
below 16 degreees and insoluble above by treating
derivatives soluble
in water above 16 degrees with caustic alkali.
add a comment |
|
|
|
|
|
|
Aug 18, 1985 - Aug 24, 1985 |
Fifth Conference on Solid State Ionics
Conference held at Lake Tahoe, CA, USA
add a comment |
|
|
|
|
|
|
1980 |
First positive lithium electrode with a larger voltage than LixTiS2.
K. Mizushima, P.C. Jones, P.J. Wiseman and J.B. Goodenough
publish "LixCoO2 (x between 0 and 1): A new cathode
material for batteries of high energy density", Materials
Research Bulletin, 15 (1980) p. 783-789
add a comment |
|
|
|
|
|
|
Oct 1927 |
First preparation of higher polypropylene glycols
P.A. Levene and A. Walti achieve the first preparation of
the higher polypropylene glycols.
add a comment |
|
|
|
|
|
|
Jul 04, 1983 - Jul 08, 1983 |
Fourth Conference on Solid State Ionics
International Conference held in Grenoble, France
add a comment |
|
|
|
|
|
|
Jan 29, 1957 |
Glass with properties of heavy structural materials
H. P. Hood and S.D. Stookey, Corning Glass, develop a
crystalline glass with properties within the range of heavy
structural materials by adding a nucleating agent like
titanium oxide to the pure mixture, which when heated,
cooled, and slowly baked yields a dense mass of
interlocking crystals.
add a comment |
|
|
|
|
|
|
1919 |
Heat-treatment by duralumin age-hardening
P.D.Merica, R.G. Waltenberg, and H. Scott, National Bureau
of
Standards, explain the heat-treatment phenomena exhibited
by duralumin
age-hardening caused by the formation of sub-microscopic
particles of
an inter-metallic compound from the supersaturated solid
solution.
add a comment |
|
|
|
|
|
|
Mar 25, 1927 |
Heterogeneous metals are more liable to corrode
U.R. Evans observes that, speaking generally, the junction
of dissimilar metals often constitutes the seat of severe
corrosion, and that, on the whole, heterogeneous materials
are more liable to attack than homogeneous materials.
add a comment |
|
|
|
|
|
|
Jul 01, 1920 |
High purity zirconium powder produced
J.W. Marden and M.N. Rich, Bureau of Mines, produce a
zirconium powder
of high purity by reducing potassium fluozirconate with
aluminum and
then distilling out (in vacuo) the resulting low-aluminum
alloy.
add a comment |
|
|
|
|
|
|
Jan 01, 1956 |
High-purity chromium
F.E. Block et al. obtain high-purity chromium by
electrolysis of purified aquaeous solutions at elevated
temperatures.
add a comment |
|
|
|
|
|
|
Dec 01, 1928 |
High-strength, low-alloy silicon-manganese steel
A.B. Kinzel, Union Carbide, introduces a high-strength, low-
alloy silicon-manganese steel with improved susceptibility
to heat treatment due to the addition of 1% carbon.
add a comment |
|
|
|
|
|
|
1956 |
Inactive gases affect surface activity of solids
J.A. Hedvall reports that inactive gases dissolved or
absorbed in oxides in some cases affect the surface
activity of the solid.
add a comment |
|
|
|
|
|
|
May 21, 1957 |
Investigation of low-temp. plastic deformation of Al alloys
While investigating with low-temperature unstable plastic
deformation of aluminum alloys, Z.S. Basinski discovers
that discontinuities in the stress-strain curve are caused
by a localized temperature rise produced during the
deformation.
add a comment |
|
|
|
|
|
|
|
|
Page 1
2
3 4
5
6
7
