David Turnbull (materials scientist)
David Turnbull (February 18, 1915 – April 28, 2007) was an American physical chemist who worked in the interdisciplinary fields of materials science and applied physics.
Turnbull made seminal contribution to solidification theory and glass formation.
Turnbull was born in Elmira, Elmira Township, Stark County, Illinois.
He graduated from high school in 1932 and then received a bachelor's degree in 1936 from Monmouth College (Illinois), specializing in physical chemistry.
He received his Ph.D. in physical chemistry under T. E. Phipps from the University of Illinois in 1939.
He was on the faculty of Case Institute of Technology from 1939 to 1946.
In 1946, he joined the General Electric research laboratory, performing research into nucleation of structural transformations occurring during the solidification of liquid metals, demonstrating that such complex processes could be quantitatively understood.
Using a low-melting-point metal, mercury, Turnbull determined that the small supercoolings usually seen were the result of heterogeneous catalysts in the melt.
When liquid mercury is dispersed as small droplets, large supercoolings could be achieved.
The previously empirical study of metal solidification was provided a consistent scientific foundation.
Turnbull and his General Electric colleagues developed metal alloy processing.
Turner and I. S. Servi developed homogeneous nucleation theory for a solid-solid transformation, providing the technologically important basis for strengthening metallic alloys through precipitation hardening.
With Morrel Cohen, he developed the free volume theory for fluid flow.
In 1950, Turnbull formulated a criterion for the ease of glass formation from supeercooled melts with a high viscosity by rapid solidification.
Independently and simultaneously to Cohen, he predicted the formation of metallic glass phases from sufficiently fast cooling of an alloy melt with a deep eutectic.
This was demonstrated by Pol Duwez at Caltech in 1959, who produced thin micron-sized sheets of an Au-Si alloy using a very high cooling rate (approximately 10 K/s).
H. S. Chen showed in 1971 that mm-sized glassy rods (so-called "bulk metallic glass," or BMG) of
Pd-Cu-Si could be produced by suction casting with a cooling rate of 1000 K/s.
In 1982, Turnbull then demonstrated that a bulk metallic glass could be produced in the Pd-Ni-P system with a cooling rate as low as 100 K/s.
In 1962, Turnbull joined Harvard University as the Gordon McKay Professor of applied physics, where he taught for 23 years.
One of his graduate students at Harvard described him as follows: "As a physicist, manager, psychologist and philosopher, he combines the erudition of a Renaissance scholar with the expert knowledge of a 20th century man of Science."
He was elected to the National Academy of Sciences in 1968, was a Fellow of the American Academy of Arts and Sciences, and was awarded the Japan Prize in 1986 "for pioneering contributions to material science".
He received the Franklin Medal in 1990.
David Turnbull died on April 28, 2007, at the age of 92, in his house in Cambridge, Massachusetts.
He was survived by two sons and a daughter.
David Turnbull (politician)
David Turnbull( born March 17, 1942) is a former politician in Ontario, Canada.
He was a Progressive Conservative member of the Legislative Assembly of Ontario from 1990 to 2003, and was a candidate for the Conservative Party of Canada in the federal election of 2004.
Percival Turnbull (archaeologist)
Percival David Turnbull( 1953- 20 August 2016) was a British archaeologist.
David Zitoun
David Zitoun is an Israeli chemist and materials scientist.
Michael Turnbull (soccer)
Michael David Turnbull( born 24 March 1981) is an Australian former professional footballer who played as goalkeeper.
Turnbull was a member of the Australian squad at the 2000 Summer Olympics in Sydney, and played in two FIFA World Youth Championships.
Marek Bartánus
Marek Bartánus( born February 13, 1987) is a Slovak ice hockey player who is currently playing for the HC Banska Bystrica in the Tipsport Liga.
He was selected by the Tampa Bay Lightning in the 4th round( 92nd overall) of the 2005 NHL Entry Draft.
Bartánus played with HC Sparta Praha in the Czech Extraliga during the 2010 – 11 Czech Extraliga season.
He previously played for Owen Sound Attack, HC Košice, HK Poprad and MHK 32 Liptovský Mikuláš.
David Turnbull (footballer)
David Turnbull( born 10 July 1999) is a Scottish professional footballer who plays as a midfielder for Motherwell.
He has also played for Scotland national football team at various youth levels.
Leticia Corral
Leticia Corral( born March 16, 1959) is a Mexican mathematician and materials scientist.
Ainissa Ramirez
Ainissa Ramirez( born January 5, 1969) is an American materials scientist and science communicator.
W. Augustus Barratt
W. Augustus Barratt( 1873- 1947) was a Scottish- born, later American, songwriter and musician.

Question: Who was born later, David Turnbull (materials scientist) or Marek Bartánus?
Answer: Marek Bartánus