Anailís ghearr ar ábhair a forbraíodh mar aon le hábhair frithchuimilte
At the same time as the development of organic friction materials, another type of friction material that is more commonly used is powder metallurgy friction materials. Before 1929, the Soviet Union's Schwarzkopf applied for the first patent for a sintered material for friction. The material was an alloy containing a small amount of lead, tin and copper. The United States also started the research of this work in 1929. In the late 1930s, the material was first used on the clutch plates of D-7 and D-8 scrapers. The American General Company organized the production of sintered materials for clutch plates in 1932, which was adopted by the aviation industry at that time.
Tá prionsabal an phróisis bhunúsacha níos aibí i réimse na n-ábhar cuimilte miotalóireacht púdair corpraithe sna paitinní a fuair Willman agus a chomhghleacaithe sna Stáit Aontaithe idir 1937-1941. Úsáideann an paitinn seo cré-umha stáin mar mhaitrís miotail an ábhair cuimilte, agus is féidir cré-umha stáin a chóimhiotail le since. Cuirtear iarann agus shilice leis chun an comhéifeacht frithchuimilte a mhéadú, agus cuirtear graifít agus luaidhe mar chomhpháirteanna bealaithe.
Thart ar thréimhse ama idir 1950-1980, úsáideadh ábhair fhrithchuimilte mhiotaleolaíocht púdair go rathúil in ionaid oibre cuimilte tirime agus frithchuimilte fliuch. Leathnaítear a réimsí feidhmchláir go coscáin agus bearradh d’fheithiclí meánacha agus troma, innealra talmhaíochta, srl. Ó 1958 i leith, tá an British Frood Company i gcomhar le American SK Wellman Company agus Bendix Aviation chun cré-umha a tháirgeadh, bunaithe ar iarann- {4}}ábhair fhrithchuimilte atá bunaithe ar chriadóireacht.