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Oct 29, 1925 |
Preparation of some metals described
A.E. Van Arkel and J.H. de Boer describe the preparation of
pure titanium, zirconium, hafnium, and thorium metals.
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May 22, 1928 |
Process for protecting duralumin alloys patented
E.H. Dix, Jr., Alcoa, patents a process for protecting
alloys of the duralumin type against corrosion by coating
the strong alloy sheet on each side with a layer of
aluminum of high purity.
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Apr 27, 1926 |
Process for separating hafnium and zirconium halogenides described
A.E. Van Arkel and J.H. de Boer describe a process for
separating hafnium and zirconium halogenides by adding a
halogenide of an element of the fifth and sixth group to
the mixture and then performing a fractional distillation.
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Oct 01, 1923 |
Process of nitriding for surface hardening described
A. Fry, Krupp, describes the process of nitriding for
surface hardening.
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Mar 01, 2001 |
Publication of Robert Cahn's history of MSE
Elsevier Science Publishers in Amsterdam publish Robert
Cahn's The Coming of Materials Science.
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1956 |
r-type cracks can be initiated by grain boundary shearing
R.C. Gifkins proposes that round or r-type cracks can be
initiated along grain boundaries by the action of grain
boundary shearing.
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Dec 01, 1921 |
Recrystallization diagram of aluminum presented
E. Rassow and L. Velde present a recrystallization diagram
of
aluminum.
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Jul 16, 1919 |
Report on specific gravity vs. strength of wood
J.A. Newton and T.R.C. Wilson report the findings of the
Forest
Products Laboratory on the nature of the relations between
the
specific gravity or density of a wood and its strength
properties.
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Feb 11, 1929 |
Resinous products are produced from vinyl esters and aldehydes
Synthetic gummy and resinous products are produced from
vinyl esters and aldehydes by H.W. Mathesan and F.W.
Skirrow, Canadian Electro Products Company.
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Apr 08, 1919 |
Resins added to paper/cloth
J.R. McLain impregnates thin cloth or paper with phenol-
formaldehyde
resins, using pressure to consolidate.
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May 30, 1922 |
Salts are catalysts to harden urea-resin adhesives
F. Pollak reports the use of salts of strong acids, i.e.
ammonium
chloride or nitrate, as catalysts to harden urea-resin
adhesives.
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Aug 1985 |
Scientific American features article on STM
Scientific American featured an article entitled "The
Scanning Tunneling Microscope" in its August 1985 issue
(Vol. 253, pp. 50-56). This broadcast knowledge of the
instrument to a wide audience.
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Jun 16, 1926 |
Shear stress for one plane of atoms to slip should be 1/6 the shear modulus
J. Frenkel calculates that the shear stress required to
cause one plane of atoms to slip over an adjacent one
should be about one-sixth the shear modulus.
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1956 |
Silver most effective in increasing Mg-Li alloy stability
Work conducted by W.R.D. Jones and G.V. Hogg, Cardiff
University, on magnesium-lithium alloys indicated silver to
be most effective in increasing alloy stability.
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Aug 01, 1957 |
Sintering of thoria
C.A. Arenburg et al. report that the addition of calcium
fluoride to vanadium pentoxide in the sintering of thoria
was beneficial in the development of high density bodies.
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Aug 01, 1957 |
Sintering of zircon and zirconia
E.P. Hyatt, C.J. Christensen, and I.B. Cutler report that
ferric oxide aided in lowering the sintering temperatures
of both zircon and zirconia bodies to give sintered bodies
of high density.
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Mar 01, 1957 |
Sintering with alumina
J.E. Burke claims that in sintering with alumina the grain
boundaries act either as sinks or as diffusion paths for
lattice vacancies.
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Sep 06, 1987 - Sep 11, 1987 |
Sixth Conference on Solid State Ionics
International Conference held at Garmisch-Partenkirchen,
Germany
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Jun 15, 1921 |
Slip interference theory of hardening proposed
Z. Jeffries and R.S Archer propose slip interference theory
of
hardening.
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Aug 13, 1921 |
Small amounts of boron can harden
R. Walter is apparantly the first to recognize that only a
very small
percentage of boron is required to produce an appreciable
hardening
effect.
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