3D printed heatsink is worse, then better – Electronics Weekly


July 8, 2016 Facebook Twitter LinkedIn Google+ 3D Printed Articles


ORNL 3D printed heatsink

3D printing, a type of additive manufacturing, makes it possible to produce one-piece exchangers with complex internal structures optimised to efficiently dissipate heat, but the printed material does not conduct heat as well as extruded aluminium, for example.

Researcher Tong Wu reported that as-printed aluminium alloy heat were between 10% worse and parity with conventionally manufactured heatsinks, while after the annealing treatment the printed heatsink demonstrated a 22.8% reduction in junction temperature and 33% reduction in weight.

Wu is a member of ORNL’s Power Electronics and Electric Machinery Research Center.

The false-colour image is is a model of a 50kW dc-to-dc converter heatsink. Red is hottest.

Aluminium is not the only thing that is being printed at ORNL.

ORNL bamboo table - 3D printed heatsink is worse, then betterAnother research team has been looking into alternative, bio-based, materials for additive manufacturing of prototypes, appliances and furniture.

“We are investigating the use of different types of cellulose fibres to develop feedstock materials with better mechanical performance that can increase the number of available composites and opportunities for sustainable practices,” said ORNL’s Soydan Ozcan.

One possibility is combining chopped bamboo fibres with a bio-polymer resin as a raw material for moulding

As a demonstration, ORNL printed a table from a material containing 10% bamboo fibre composite.

ORNL 3D printed heatsink

3D printing, a type of additive manufacturing, makes it possible to produce one-piece exchangers with complex internal structures optimised to efficiently dissipate heat, but the printed material does not conduct heat as well as extruded aluminium, for example.

Researcher Tong Wu reported that as-printed aluminium alloy heat were between 10% worse and parity with conventionally manufactured heatsinks, while after the annealing treatment the printed heatsink demonstrated a 22.8% reduction in junction temperature and 33% reduction in weight.

Wu is a member of ORNL’s Power Electronics and Electric Machinery Research Center.

The false-colour image is is a model of a 50kW dc-to-dc converter heatsink. Red is hottest.

Aluminium is not the only thing that is being printed at ORNL.

ORNL bamboo table - 3D printed heatsink is worse, then betterAnother research team has been looking into alternative, bio-based, materials for additive manufacturing of prototypes, appliances and furniture.

“We are investigating the use of different types of cellulose fibres to develop feedstock materials with better mechanical performance that can increase the number of available composites and opportunities for sustainable practices,” said ORNL’s Soydan Ozcan.

One possibility is combining chopped bamboo fibres with a bio-polymer resin as a raw material for moulding

As a demonstration, ORNL printed a table from a material containing 10% bamboo fibre composite.

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