Subliming ablators
Ablative materials in design and construction, are materials that are generally resistant to high temperatures in one of three ways and used for thermal protection. Subliming ablators perform through sublimation and eventual melting.
Subliming ablators, act as heat sinks until the surface of the material reaches sublimation or melting point (thus also referred to as - subliming / melting ablators), thus removing the heat from the protected object. In some cases a layer of gas is formed which helps remove heat from the object, in other cases an endothermic reaction occurs increasing the material temperature whilst decreasing the surrounding temperature, sacrificially.
In doing this ablative materials may pyrolyse mitigating a heat load, so in effect they decompose or change as a result of the heat being applied. For example ablative coating might contain hydrates, as they are heated, they decompose, and water vapour is released, this has a cooling effect, the insulation characteristics of the charred remains after the water is vaporised can slow the heat transfer. These types of materials are also often carbon related composites such as Teflon.
Two other types of related ablative materials are charring ablators and Intumescent ablators.
[edit] Related articles on Designing Buildings
Featured articles and news
A dynamic brand built for impact stitched into BSRIA’s building fabric.
NBS launches industry guide for specification writing
Available for free and as immediate download.
Peter Barber’s work revives forgotten building types.
Insights of how to attract more young people to construction
Results from CIOB survey of 16-24 year olds and parents.
Focussing on the practical implementation of electrification.
Preston flood scheme completes primary school SuDS
Three primary schools benefit from SuDS schemes.
Sustainable Urban Drainage and Biodiversity
Awards for champions of these interconnected fields now open.
Microcosm of biodiversity in balconies and containers
Minor design adaptations for considerable biodiversity benefit.
CIOB student competitive construction challenge Ireland
Inspiring a new wave of Irish construction professionals.
Challenges of the net zero transition in Scotland
Skills shortage and ageing workforce hampering Scottish transition to net zero.
Private rental sector, living standards and fuel poverty
Report from the NRH in partnership with Impact on Urban Health.
.Cold chain condensing units market update
Tracking the evolution of commercial refrigeration unit markets.
Attending a conservation training course, personal account
The benefits of further learning for professsionals.
Restoring Alexander Pope's grotto
The only surviving part of his villa in Twickenham.
International Women's Day 8 March, 2025
Accelerating Action for For ALL Women and Girls: Rights. Equality. Empowerment.
Lack of construction careers advice threatens housing targets
CIOB warning on Government plans to accelerate housebuilding and development.
BSRIA market intelligence division key appointment
Lisa Wiltshire to lead rapidly growing Market Intelligence division.
Comments
[edit] o make a comment about this article, click 'Add a comment' above. Separate your comments from any existing comments by inserting a horizontal line.