{"product_id":"rapid-3dshield-boron-carbide-filament","title":"Rapid 3DShield Boron Carbide Filament | Neutron Shielding","description":"\u003cp\u003e\u003cstrong\u003eRapid 3DShield Boron Carbide\u003c\/strong\u003e prints non-toxic thermal-neutron shielding on the FFF printer you already have. It is 50–60% boron carbide in a PLA-based binder, and parts absorb neutrons straight off the bed: no debinding, sintering or machining. Made in South Central Wisconsin, USA.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoron carbide content:\u003c\/strong\u003e 50.0%–60.0%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFilament density:\u003c\/strong\u003e 1.30–1.50 g\/cc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFormats:\u003c\/strong\u003e 1.75mm and 2.85mm spools, and pellets (pick in the variant selector)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNozzle:\u003c\/strong\u003e 0.6mm hardened steel, standard flow (boron carbide is extremely abrasive)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eHow it works\u003c\/h2\u003e\u003cp\u003eBoron-10 (19.9% of natural boron) absorbs thermal neutrons with a cross-section of about 3,840 barns. At mid-spec loading the calculated thermal-neutron mean free path in a fully dense print is about 0.4 mm, so a few millimetres of wall absorbs nearly all of a thermal beam. Capture products are stable, so the part does not build up long-lived activation.\u003c\/p\u003e\u003ch2\u003ePrinting\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePrints similar to PLA with minimal to no warping\u003c\/li\u003e\n\u003cli\u003eFeed the filament straight into the extruder\u003c\/li\u003e\n\u003cli\u003eDo not dry it: drying degrades the binder\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"The Virtual Foundry","offers":[{"title":"1.75mm \/ 0.25kg","offer_id":49962966024430,"sku":"FBC175250G","price":300.99,"currency_code":"USD","in_stock":true},{"title":"1.75mm \/ 0.5kg","offer_id":49962966057198,"sku":"FBC175500G","price":564.99,"currency_code":"USD","in_stock":true},{"title":"2.85mm \/ 0.25kg","offer_id":49962966089966,"sku":"FBC285250G","price":300.99,"currency_code":"USD","in_stock":true},{"title":"2.85mm \/ 0.5kg","offer_id":49962966122734,"sku":"FBC285500G","price":564.99,"currency_code":"USD","in_stock":true},{"title":"Pellets (1kg only) \/ 1kg (pellets only)","offer_id":49962966155502,"sku":"FBCPEL1KG","price":1048.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0714\/3578\/0334\/files\/HalfBoronCarbideSpool750.png?v=1793822376","url":"https:\/\/makerparts3d.com\/products\/rapid-3dshield-boron-carbide-filament","provider":"MakerParts 3D","version":"1.0","type":"link"}