Cryogenic Helium Processing Approaches New Levels of Affordability

Released on: July 2, 2008, 6:58 am

Press Release Author: Ryan M. Taylor / Cryogenic Institute of New England, Inc.

Industry: Aerospace

Press Release Summary: The Cryogenic Institute of New England, Inc. introduces a new
capability of utilizing liquid helium for cryogenic treatment of materials to
temperatures as low as 4K /-268C/-451F.

Press Release Body: The Cryogenic Institute of New England, Inc. introduces a new
capability of utilizing liquid helium for cryogenic treatment of materials to
temperatures as low as 4K /-268C/-451F. Measurements were recorded by attaching a
spring loaded silicone diode cryogenic temperature sensor rated to 1.4K with a
calibrated accuracy of +/- 10mK.

The procedure involves the utilization of a specially modified cryogenic chamber
that was designed and constructed in collaboration with technology partner Applied
Cryogenics Inc. The chamber utilizes multiple dedicated delivery systems for
introduction of both liquid nitrogen and liquid helium. The system also utilizes an
advanced insulation scheme that involves a combination of sophisticated
polyisoanurate materials, as well as vacuum and liquid nitrogen jackets for maximum
effectiveness. A proprietary method for controlling the delivery of the helium to
the chamber enables controlled rates of temperature change.

According to Robin Rhodes, President of Cryogenic Institute of New England, Inc.,
the capability grew from the needs of its aerospace customers who sought extreme
temperature cycling for residual stress relief of critical components. "It was a
natural extension for us to push beyond the limits of liquid nitrogen
(77K/-196C/-320F), where we work every day, into the coldest cryogens available",
Rhodes stated. The company reported that they have delivered controlled cryogenic
treatment profiles at temperatures ranging from 16K to 4K (-257C/-430F to
-268C/-451F) over a dozen times in the past year. The temperatures and profiles were
specified by the firm's customers, who Rhodes declined to identify because of
confidentiality agreements.

While the majority of applications have been related to aerospace, the firm has also
offered the capability to researchers and other industries, including electronics.
Cost for the treatment varies, depending on ramp and soak times, but Rhodes
estimates that his firm can offer a near absolute zero treatment cycle (to 4K) for
less than 30% of the cost of similar processing as offered through governmental and
other research organizations. "We feel that we have a real price breakthrough that
will lead to further commercialization of ultra deep cryogenic treatments for
residual stress relief and other transformations in materials", Mr. Rhodes stated.

The Cryogenic Institute of New England, Inc., located at 90 Ellsworth St. Worcester,
MA, is dedicated to the commercial application of cryogenic technologies to serve
the needs of industry, government and scientists. The firm offers a full range of
cryogenic services, including conventional cryogenic treatment, heat & freeze
thermal cycling, cryogenic deflashing & deburring services, shrink fitting services,
and dry ice (CO2) blast cleaning. It also offers engineering services, cryogenic
lab work in support of R & D, and custom equipment design for new and unique
cryogenic applications. It is a corporate sustaining member of the Cryogenic Society
of America.

Web Site:

Contact Details: 90 Ellsworth St., Worcester, MA 01610
P: 508 459 7447
F: 508 459 7426

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