{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:SK2LNM3BYGI44J3INYORJPZ7PT","short_pith_number":"pith:SK2LNM3B","schema_version":"1.0","canonical_sha256":"92b4b6b361c191ce27686e1d14bf3f7ce7809eb6c05446bddd6a7e688b605414","source":{"kind":"arxiv","id":"1703.02115","version":1},"attestation_state":"computed","paper":{"title":"Computational Search for Novel Hard Chromium-Based Materials","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Alexander G. Kvashnin, Artem I. Samtsevich, Artem R. Oganov, Zahed Allahyari","submitted_at":"2017-03-06T21:27:29Z","abstract_excerpt":"Nitrides, carbides and borides of transition metals are an attractive class of hard materials. Our recent preliminary explorations of the binary chemical compounds indicated that chromium-based materials are among the hardest transition metal compounds. Motivated by this, here we explore in detail the binary Cr-B, Cr-C and Cr-N systems using global optimization techniques. Calculated enthalpy of formation and hardness of predicted materials were used for Pareto optimization to define the hardest materials with lowest energy. Our calculations recover all numerous known stable compounds (except "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1703.02115","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2017-03-06T21:27:29Z","cross_cats_sorted":[],"title_canon_sha256":"414f9cc338d59c7382da750efeac707aeea98c03e7eac600be9b8a1878b6cde9","abstract_canon_sha256":"7fb30111b337cf9eea617a9b3cd98636093bbef36653e845b1cca2eabebe6841"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:49:20.682416Z","signature_b64":"xsfu35uET+8W9n6IQUoxrAWLw118XcGn4jwmd2JoNITwre2br2LSlb7bnCfBWTM/bIaUS7qBJfgk3swFpas2BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"92b4b6b361c191ce27686e1d14bf3f7ce7809eb6c05446bddd6a7e688b605414","last_reissued_at":"2026-05-18T00:49:20.682048Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:49:20.682048Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Computational Search for Novel Hard Chromium-Based Materials","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Alexander G. Kvashnin, Artem I. Samtsevich, Artem R. Oganov, Zahed Allahyari","submitted_at":"2017-03-06T21:27:29Z","abstract_excerpt":"Nitrides, carbides and borides of transition metals are an attractive class of hard materials. Our recent preliminary explorations of the binary chemical compounds indicated that chromium-based materials are among the hardest transition metal compounds. Motivated by this, here we explore in detail the binary Cr-B, Cr-C and Cr-N systems using global optimization techniques. Calculated enthalpy of formation and hardness of predicted materials were used for Pareto optimization to define the hardest materials with lowest energy. Our calculations recover all numerous known stable compounds (except "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.02115","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1703.02115","created_at":"2026-05-18T00:49:20.682106+00:00"},{"alias_kind":"arxiv_version","alias_value":"1703.02115v1","created_at":"2026-05-18T00:49:20.682106+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.02115","created_at":"2026-05-18T00:49:20.682106+00:00"},{"alias_kind":"pith_short_12","alias_value":"SK2LNM3BYGI4","created_at":"2026-05-18T12:31:43.269735+00:00"},{"alias_kind":"pith_short_16","alias_value":"SK2LNM3BYGI44J3I","created_at":"2026-05-18T12:31:43.269735+00:00"},{"alias_kind":"pith_short_8","alias_value":"SK2LNM3B","created_at":"2026-05-18T12:31:43.269735+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/SK2LNM3BYGI44J3INYORJPZ7PT","json":"https://pith.science/pith/SK2LNM3BYGI44J3INYORJPZ7PT.json","graph_json":"https://pith.science/api/pith-number/SK2LNM3BYGI44J3INYORJPZ7PT/graph.json","events_json":"https://pith.science/api/pith-number/SK2LNM3BYGI44J3INYORJPZ7PT/events.json","paper":"https://pith.science/paper/SK2LNM3B"},"agent_actions":{"view_html":"https://pith.science/pith/SK2LNM3BYGI44J3INYORJPZ7PT","download_json":"https://pith.science/pith/SK2LNM3BYGI44J3INYORJPZ7PT.json","view_paper":"https://pith.science/paper/SK2LNM3B","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1703.02115&json=true","fetch_graph":"https://pith.science/api/pith-number/SK2LNM3BYGI44J3INYORJPZ7PT/graph.json","fetch_events":"https://pith.science/api/pith-number/SK2LNM3BYGI44J3INYORJPZ7PT/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/SK2LNM3BYGI44J3INYORJPZ7PT/action/timestamp_anchor","attest_storage":"https://pith.science/pith/SK2LNM3BYGI44J3INYORJPZ7PT/action/storage_attestation","attest_author":"https://pith.science/pith/SK2LNM3BYGI44J3INYORJPZ7PT/action/author_attestation","sign_citation":"https://pith.science/pith/SK2LNM3BYGI44J3INYORJPZ7PT/action/citation_signature","submit_replication":"https://pith.science/pith/SK2LNM3BYGI44J3INYORJPZ7PT/action/replication_record"}},"created_at":"2026-05-18T00:49:20.682106+00:00","updated_at":"2026-05-18T00:49:20.682106+00:00"}