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
PAC report on the Remediation of Dangerous Cladding
Recommendations on workforce, transparency, support, insurance, funding, fraud and mismanagement.
New towns, expanded settlements and housing delivery
Modular inquiry asks if new towns and expanded settlements are an effective means of delivering housing.
Building Engineering Business Survey Q1 2025
Survey shows growth remains flat as skill shortages and volatile pricing persist.
Construction contract awards remain buoyant
Infrastructure up but residential struggles.
Home builders call for suspension of Building Safety Levy
HBF with over 100 home builders write to the Chancellor.
CIOB Apprentice of the Year 2024/2025
CIOB names James Monk a quantity surveyor from Cambridge as the winner.
Warm Homes Plan and existing energy bill support policies
Breaking down what existing policies are and what they do.
Treasury responds to sector submission on Warm Homes
Trade associations call on Government to make good on manifesto pledge for the upgrading of 5 million homes.
A tour through Robotic Installation Systems for Elevators, Innovation Labs, MetaCore and PORT tech.
A dynamic brand built for impact stitched into BSRIA’s building fabric.
BS 9991:2024 and the recently published CLC advisory note
Fire safety in the design, management and use of residential buildings. Code of practice.
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.
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.