TWI700137B - 金屬積層造形用金屬粉及使用該金屬粉而製作之造形物 - Google Patents
金屬積層造形用金屬粉及使用該金屬粉而製作之造形物 Download PDFInfo
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- 239000000843 powder Substances 0.000 title claims abstract description 92
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 79
- 239000002184 metal Substances 0.000 title claims abstract description 79
- 238000003475 lamination Methods 0.000 title description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 82
- 229910052802 copper Inorganic materials 0.000 claims abstract description 53
- 239000010949 copper Substances 0.000 claims abstract description 53
- 229910000881 Cu alloy Inorganic materials 0.000 claims abstract description 45
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 11
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 7
- 229910052779 Neodymium Inorganic materials 0.000 claims abstract description 6
- 229910052703 rhodium Inorganic materials 0.000 claims abstract description 6
- 229910052727 yttrium Inorganic materials 0.000 claims abstract description 6
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 5
- 229910052688 Gadolinium Inorganic materials 0.000 claims abstract description 5
- 229910052777 Praseodymium Inorganic materials 0.000 claims abstract description 5
- 229910052772 Samarium Inorganic materials 0.000 claims abstract description 5
- 229910052776 Thorium Inorganic materials 0.000 claims abstract description 5
- 229910052775 Thulium Inorganic materials 0.000 claims abstract description 5
- 229910052770 Uranium Inorganic materials 0.000 claims abstract description 5
- 229910052735 hafnium Inorganic materials 0.000 claims abstract description 5
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 5
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 5
- 229910052762 osmium Inorganic materials 0.000 claims abstract description 5
- 229910052702 rhenium Inorganic materials 0.000 claims abstract description 5
- 229910052713 technetium Inorganic materials 0.000 claims abstract description 5
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims description 20
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 17
- 239000001301 oxygen Substances 0.000 claims description 17
- 229910052760 oxygen Inorganic materials 0.000 claims description 17
- 229910052721 tungsten Inorganic materials 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 15
- 238000002844 melting Methods 0.000 abstract description 9
- 230000008018 melting Effects 0.000 abstract description 9
- 238000010521 absorption reaction Methods 0.000 description 19
- 230000000052 comparative effect Effects 0.000 description 13
- 239000007769 metal material Substances 0.000 description 11
- 238000004544 sputter deposition Methods 0.000 description 11
- 238000001766 barrel sputter deposition Methods 0.000 description 9
- 238000010894 electron beam technology Methods 0.000 description 8
- 238000007747 plating Methods 0.000 description 8
- 239000006104 solid solution Substances 0.000 description 6
- 238000004381 surface treatment Methods 0.000 description 6
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 229910002530 Cu-Y Inorganic materials 0.000 description 2
- 229910017813 Cu—Cr Inorganic materials 0.000 description 2
- 229910017985 Cu—Zr Inorganic materials 0.000 description 2
- 229910052797 bismuth Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000010587 phase diagram Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000007088 Archimedes method Methods 0.000 description 1
- 229910000967 As alloy Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000001739 density measurement Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001941 electron spectroscopy Methods 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 230000009291 secondary effect Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000005478 sputtering type Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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- B22F10/30—Process control
- B22F10/34—Process control of powder characteristics, e.g. density, oxidation or flowability
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- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
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- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y80/00—Products made by additive manufacturing
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- B22F3/10—Sintering only
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Abstract
本發明係一種金屬粉,其特徵在於:於銅或銅合金粉之表面形成由Gd、Ho、Lu、Mo、Nb、Os、Re、Ru、Tb、Tc、Th、Tm、U、V、W、Y、Zr、Cr、Rh、Hf、La、Ce、Pr、Nd、Pm、Sm、Ti中之任一種以上所構成之皮膜,且上述皮膜之膜厚為5nm以上且500nm以下。本發明之課題在於提供一種金屬粉及使用該金屬粉而製作之造形物,該金屬粉係利用雷射方式之金屬積層造形用金屬粉,且可維持銅或銅合金之高導電性,並且高效率地進行藉由雷射之熔融。
Description
本發明係關於一種適於金屬積層造形之金屬粉、及使用該金屬粉而製作之造形物。
近年來,嘗試使用金屬3D印表機技術,來製作複雜形狀且難以造形之立體構造之金屬零件。3D印表機亦被稱為積層造形法(AM),為如下方法:於平板上薄薄地鋪滿金屬粉而形成金屬粉末層,使電子束或雷射光掃描該金屬粉末層而使之熔融、凝固,另外,於其上薄薄地鋪滿新粉末,以相同之方式藉由雷射光使特定之部分熔融、凝固,重複進行該步驟,藉此製作複雜形狀之金屬造形物。
作為金屬積層造形中使用之金屬粉,於專利文獻1中揭示有一種實施表面處理後之金屬粉。該技術藉由使用矽烷偶合劑等於銅粉等金屬粉之表面形成有機皮膜,可於不藉由預加熱進行部分燒結之情況下以沈積之狀態對金屬粉直接照射電子束(EB)。作為EB方式中使用之粉末,為了提昇粉體之特性,有效的是實施如上所述之表面處理而於金屬粉之表面形成皮膜。
[先前技術文獻]
[專利文獻]
專利文獻1:日本特開2017-25392號公報
另一方面,於為雷射方式之情形時,使用雷射光作為熱源,另外,無需如EB方式之預加熱,故而對金屬粉所要求之特性與使用電子束之EB方式不同。於雷射方式之金屬積層造形中,亦考慮對金屬粉實施表面處理而改善特性,但必須考慮與EB不同之雷射特有之問題。
根據此種情況,本發明之課題在於提供一種金屬粉及使用該金屬粉而製作之造形物,該金屬粉係利用雷射方式之金屬積層造形用金屬粉,且可維持銅或銅合金之高導電性,並且高效率地進行藉由雷射之熔融。
為了解決上述課題,本發明人等進行努力研究,結果獲得如下見解:藉由利用雷射光之吸收率高、且不固溶或不易固溶於銅之金屬材料於銅或銅合金粉之表面形成皮膜,而使上述課題、即維持銅或銅合金之高導電性並且高效率地進行藉由雷射之熔融變得可能。本案係基於該見解,提供以下之發明。
1)一種金屬粉,其特徵在於:於銅或銅合金粉之表面形成由Gd、Ho、Lu、Mo、Nb、Os、Re、Ru、Tb、Tc、Th、Tm、U、V、W、Y、Zr、Cr、Rh、Hf、La、Ce、Pr、Nd、Pm、Sm、Ti中之任一種以上所構成之皮膜,且上述皮膜之膜厚為5nm以上且500nm以下。
2)如上述1)記載之金屬粉,其特徵在於:銅或銅合金粉之粒徑d50為20μm以上且100μm以下。
3)如上述1)或2)記載之金屬粉,其特徵在於:銅或銅合金粉之氧濃度為1000wtppm以下。
4)一種金屬積層造形物,其使用有上述1)至3)中任一項記載之金屬
粉,其特徵在於:導電率為90%IACS以上。
5)如上述4)記載之金屬積層造形物,其特徵在於:相對密度為97%以上。
形成於銅或銅合金之表面之皮膜(金屬材料)幾乎不固溶於銅或銅合金內,故而可維持銅或銅合金之高導電性,並且金屬積層造形中使用之雷射光之吸收率高,故而可高效率地進行藉由雷射之熔融,可提高作業效率。進而,形成於銅或銅合金之表面之被膜之組成由於導熱度小於銅,故而可更有效率地使用雷射光之熱。另外,作為次要之效果,構成皮膜之上述金屬材料之熔點高於銅或銅合金,故而不易發生由雷射光之熱所引起之變質,即便於對造形無助益而進行回收並再利用之情形時,亦可維持粉末之性狀。
銅雖具有高導電性(導電率:95%IACS),但產生若構成皮膜之金屬材料固溶於銅或銅合金中,則無法維持其優異之導電性之問題。因此,作為皮膜中使用之金屬材料,選擇不固溶或不易固溶於銅或銅合金之材料。此處,對銅之固溶量係金屬元素之固有性質,一般可自被稱為相圖之表示兩個元素相對於溫度之相關關係之圖中提取材料。本發明係於相圖中參照銅側之固溶量,使用於液相以下之溫度下最大固溶量為0.2at%以下之金屬材料。
作為對銅之固溶量為0.2at%以下之金屬材料,較佳為使用Gd、Ho、Lu、Mo、Nb、Os、Re、Ru、Tb、Tc、Th、Tm、U、V、W、Y、Zr、
Cr、Rh、Hf、La、Ce、Pr、Nd、Pm、Sm、Ti中之任一種以上。另外,該金屬材料對於雷射方式之金屬積層造形中通常使用之Nd:YAG雷射(波長:1064nm)表現出較高之吸收率。具體而言,銅單質之吸收率為13%左右,相對於此,於藉由該等金屬材料形成皮膜之情形時,較低者亦表現出20%以上之吸收率,於較高之情形時表現出30%以上之吸收率,於更高之情形時表現出40%以上之吸收率。藉由利用此種金屬材料被覆銅或銅合金粉之表面,可維持銅之較高之導電率,並且高效率地進行藉由雷射之熔融。
金屬積層造形中所使用之銅或銅合金粉通常使用數微米至數百微米者。較佳為對於此種銅或銅合金粉,將上述皮膜之膜厚設為5nm以上且500nm以下。若皮膜之膜厚未達5nm,則有無法充分地獲得作為表面皮膜之上述效果之情況。另一方面,於膜厚為500nm之情形時,於經表面處理之銅或銅合金粉中,表面皮膜之比率成為10wt%左右,若為該程度,則可將對銅之固溶量維持為較低,於造形物中保持銅之較高之導電性。
形成於銅粉之表面皮膜之膜厚可利用AES(歐傑電子能譜法)藉由深度方向之分析來進行測定。
[AES分析]
分析裝置:AES(日本電子股份有限公司製造,型式JAMP-7800F)
‧極限真空度:2.0×10-8Pa
‧試樣傾斜角:30度
‧絲極電流:2.22A
‧探針電壓:10kV
‧探針電流:2.8×10-8A
‧探針直徑:約500nm
‧濺鍍速率:1.9nm/min(以SiO2換算)
作為銅或銅合金粉,較佳為使用平均粒徑d50為20μm以上且100μm以下者。藉由將平均粒徑d50設為20μm以上,於造形時粉末不易飛揚,粉末之操作變得容易。另外,藉由將平均粒徑d50設為100μm以下,容易製造高精細之積層造形物。此外,平均粒徑d50係指於進行圖像分析測定所獲得之粒度分佈中累計值50%時之粒徑。
銅或銅合金粉中之氧濃度較佳為1000wtppm以下,更佳為500wtppm以下。進而較佳為250wtppm以下。其原因在於:若於銅或銅合金粉之內部氧較少,則可避免於內包有氧之狀態下成為造形物,可減小對造形物之導電性造成不良影響之可能性。氧濃度可藉由LECO公司製造之TCH600,利用非活性氣體熔解法進行測定。
於本發明中,使用銅或銅合金作為金屬積層造形用金屬粉之基質金屬,作為銅合金,較佳為使用含有12at%以下之Cr、Bi、W、Y、Zr、Nd中之任一種以上者作為合金成分。另外,該等金屬對銅之固溶量未達0.2at%,如上所述無損銅之導電性之成分。另外,藉由該等元素之添加,雷射之吸收率變高,可更高效率地進行藉由雷射之熔融。
對本發明之銅或銅合金粉之表面處理方法進行說明。
首先,準備必需量之銅或銅合金粉。粉末較佳為使用平均粒徑d50為20~100μm者。粒徑可藉由進行篩選而獲得目標粒度。另外,銅或合金粉可使用霧化法製作,另外,藉由調整製作霧化粉時之環境之氧濃度,可將銅或銅合金粉中所含之氧濃度設為1000wtppm以下。
其次,對銅或銅合金粉進行表面處理。表面處理可使用鍍覆法或筒式濺鍍法實施。於鍍覆法中,將銅或銅合金粉浸漬於鍍覆液中,於銅或銅合金粉之表面形成金屬鍍覆層。此時,可根據形成皮膜之金屬種類,選擇鍍覆液,另外,藉由調整鍍覆時間,可適當調整皮膜之厚度。
於筒式濺鍍法中,將銅或銅合金粉投入至多角滾筒中,一面使滾筒旋轉,一面濺鍍金屬材料(靶)而於銅粉之表面形成其金屬皮膜。此時,根據形成皮膜之金屬或合金之種類,選擇濺鍍靶之種類。此外,於為合金之情形時,使用合金靶,或者使用同時濺鍍,藉此可形成合金皮膜。表面皮膜之膜厚可藉由使濺鍍之輸出與時間、滾筒之轉速等變化來進行調整。藉此,可獲得於銅或銅合金粉形成有特定之金屬皮膜之金屬粉。
實施例
以下,基於實施例及比較例進行說明。此外,本實施例僅為一例,並不受該例任何限制。即,本發明僅由申請專利範圍限制,包含本發明中所包括之實施例以外之各種變化。
(實施例1-5:表面皮膜之膜厚)
準備粒徑d50:25μm、氧濃度:750wt%之霧化銅粉,使用筒式濺鍍裝置,於該銅粉之表面形成鋯皮膜。此時,將濺鍍輸出設為100W,將滾筒之轉速設為4rpm,調整濺鍍時間,藉此使皮膜之膜厚變化。實施例1-5係分別使膜厚變化為5nm、50nm、100nm、300nm、500nm者。
使用分光光度計(日立製作所製造,U-4100),對形成有皮膜之銅粉測定波長1064nm之雷射光之吸收率。將其結果示於表1。確認到於實施例1-5中,與未形成皮膜之銅粉(比較例1)相比,吸收率均變高。另外,可知隨著膜厚變厚,吸收率增加。
其次,使用金屬積層造形機(Concept Laser製造),製作造形物(90mm×40mm×20mm),對該造形物使用市售之渦流式導電率計測定導電率。其結果為導電率均表現出90%IACS以上之良好之值。此外,IACS(International annealed copper standard,國際退火銅標準)係作為電阻(或導電度)之基準,將國際上採用之退火標準軟銅(體積電阻率:1.7241×10-2 μΩcm)之導電率規定為100%IACS。
另外,亦對各造形物之相對密度進行測定。於造形物之密度測定中,使用阿基米德法,依據「JIS Z 2501:燒結金屬材料-密度、含油率及開放氣孔率試驗方法」進行。此外,液體使用水。將理論密度設為8.94,計算相對密度(=理論密度/測定密度×100),結果獲得均為97%以上之高密度者。
另外,使用供於4次以上之造形但對造形無助益而回收之粉末(未造形粉)而製作造形物(90mm×40mm×20mm)。以與上述相同之方式對該造形物測定相對密度及導電率,結果可見到密度降低,但關於導電率,均表現出90%IACS以上之良好之值。
(實施例6-31:表面皮膜之金屬種類)
準備粒徑d50:25μm、氧濃度:750wt%之霧化銅粉,使用筒式濺鍍裝置,改變金屬之種類(Gd、Ho、Lu、Mo、Nb、Os、Re、Ru、Tb、Tc、Th、Tm、U、V、W、Y、Zr、Cr、Rh、Hf、La、Ce、Pr、Nd、Pm、Sm)於該銅粉之表面形成皮膜。此外,以皮膜之膜厚成為100nm之方式調整濺鍍條件或滾筒之轉速。
對形成有皮膜之銅粉,以與實施例1相同之方式測定波長1064nm之雷射光之吸收率。將其結果示於表1。確認到於實施例6-31中,與未形成皮膜之銅粉(比較例1)相比,吸收率均變高。另外,使用各金屬粉,以與實施例1相同之方式製作造形物,測定其相對密度及導電率。如表1所示,於任一情形時,均獲得相對密度為97%以上之高密度者,另外,導電率亦表現出90%IACS以上之良好之值。另外,關於使用未造形粉所製作之造形物,可見到密度降低,但導電率均表現出90%IACS以上之良好之值。
(實施例32-37:藉由鍍覆處理或化學合成處理之皮膜形成)
準備粒徑d50:25μm、氧濃度:750wt%之霧化銅粉,使用鍍覆處理或化學 合成處理(鉻酸鹽處理、鈦酸鹽處理),於該銅粉之表面形成金屬(Cr、Ru、Rh、Os、Ti)之皮膜。此外,以皮膜之膜厚成為100nm之方式,調整各種處理條件。
以與實施例1相同之方式對形成有皮膜之銅粉測定波長1064nm之雷射光之吸收率。將其結果示於表1。確認到於實施例32-37中,與未形成皮膜之銅粉(比較例1)相比,吸收率均變高。另外,使用各金屬粉,以與實施例1相同之方式製作造形物,測定其相對密度及導電率。如表1所示,於任一情形時,均獲得相對密度為97%以上之高密度者,另外,導電率亦表現出90%IACS以上之良好之值。另外,關於使用未造形粉所製作之造形物,可見到密度降低,但導電率均表現出90%IACS以上之良好之值。
(實施例38-39:銅粉之粒徑)
將霧化銅粉之粒徑d50分別設為50μm、80μm,除此以外,以與實施例2相同之方式,使用筒式濺鍍裝置,於該銅粉之表面形成鋯皮膜。濺鍍條件或滾筒之轉速係以膜厚成為50nm之方式適當調整。
以與實施例1相同之方式對形成有皮膜之銅粉測定波長1064nm之雷射光之吸收率。將其結果示於表1。確認到於實施例38、39中,與未形成皮膜之銅粉(比較例1)相比,吸收率均變高。另外,使用各金屬粉,以與實施例1相同之方式製作造形物,測定其相對密度及導電率。如表1所示,於任一情形時,均獲得相對密度為97%以上之高密度者,另外,導電率亦表現出90%IACS以上之良好之值。另外,關於使用未造形粉所製作之造形物,可見到密度降低,但導電率均表現出90%IACS以上之良好之值。
(實施例40-41:銅粉之氧濃度)
將霧化銅粉之氧濃度分別設為450wtppm、200wtppm,除此以外,以與實施例2相同之方式,使用筒式濺鍍裝置,於該銅粉之表面形成鋯皮膜。濺鍍條件或滾筒之轉速係以膜厚成為50nm之方式適當調整。
以與實施例1相同之方式對形成有皮膜之銅粉測定波長1064nm之雷射光之吸收率。將其結果示於表1。確認到於實施例40、41中,與未形成皮膜之銅粉(比較例1)相比,吸收率均變高。另外,使用各金屬粉,以與實施例1相同之方式製作造形物,測定其相對密度及導電率。如表1所示,於任一情形時,均獲得相對密度為97%以上之高密度者,另外,導電率亦表現出90%IACS以上之良好之值。另外,關於使用未造形粉所製作之造形物,可見到密度降低,但導電率均表現出90%IACS以上之良好之值。
(實施例42-61:於銅合金粉之情形時)
準備粒徑d50:25μm、氧濃度:750wt%之霧化銅合金粉(Cu-Cr、Cu-Bi、Cu-W、Cu-Y、Cu-Zr、Cu-Nd),使用筒式濺鍍裝置,於該銅合金粉之表面形成鋯皮膜。濺鍍條件或滾筒之轉速係以膜厚成為100nm之方式適當調整。
以與實施例1相同之方式對形成有皮膜之銅合金粉測定波長1064nm之雷射光之吸收率。將其結果示於表1。確認到於實施例42-61中,與未形成皮膜之銅合金粉(比較例2-7)相比,吸收率均變高。另外,使用各金屬粉,以與實施例1相同之方式製作造形物,測定其相對密度及導電率。如表1所示,於任一情形時,均獲得相對密度為97%以上之高密度者,另外,導電率亦表現出90%IACS以上之良好之值。另外,關於使用未造形粉所製作之造形物,可見到密度降低,但導電率均表現出90%IACS以上之良好之值。
(比較例1-7:無皮膜之銅粉或銅合金粉)
準備粒徑d50:25μm、氧濃度:750wt%之銅或銅合金(Cu-Cr、Cu-Bi、Cu-W、Cu-Y、Cu-Zr、Cu-Nd)霧化粉。
對該銅或銅合金粉,以與實施例1相同之方式測定波長1064nm之雷射光之吸收率。將其結果示於表2。比較例1-7中吸收率均為13~27%左右。另外,使用各金屬粉,以與實施例1相同之方式製作造形物,測定其相對密度及導電率。如表2所示,於任一情形時,相對密度均為83~95%左右,與形成有皮膜之情形相比為低密度。另外,導電率亦為85%IACS左右,與形成皮膜之情形相比,導電率較低。
(比較例8-12:表面皮膜之金屬種類)
準備粒徑d50:25μm、氧濃度:750wt%之霧化銅粉,使用筒式濺鍍裝置,於該銅粉之表面形成各金屬(Ni、Co、Zn,Au、Ag)皮膜。此外,以皮膜之膜厚成為100nm之方式,調整各濺鍍條件或滾筒之轉速。
另外,使用各金屬粉,以與實施例1相同之方式製作造形物,測定其相對密度及導電率。如表2所示,導電率亦為85%IACS左右,與形成實施例6-31之皮膜之情形相比導電率降低。
(比較例13-14:表面皮膜之膜厚)
準備粒徑d50:25μm、氧濃度:750wt%之霧化銅粉,使用筒式濺鍍裝置,於該銅粉之表面形成鋯皮膜。此時,調整濺鍍條件及滾筒之轉速,分別使膜厚變化為2nm、700nm。對該金屬粉,以與實施例1相同之方式測定波長1064nm之雷射光之吸收率。將其結果示於表2。將膜厚設為2nm之比較例13之吸收率為17%左右。另外,使用各金屬粉,以與實施例1相同之方式製作造形物,測定其相對密度及導電率。如表2所示,將膜厚設為700nm之比較例14之導電率為88%IACS左右,導電率降低。
[產業上之可利用性]
本發明之金屬粉藉由於銅或銅合金粉之表面形成特定之金屬皮膜,雷射光之吸收率上升,可高效率地進行藉由雷射之熔融,並且可維持銅或銅合金之高導電性。本發明之金屬粉可用作用以製造「為複雜形狀,尤其要求高傳導率或高密度之金屬零件(以散熱為目的之散熱片或熱交換器、電子零件用接頭材料等)」之雷射式金屬積層造形用金屬粉。
Claims (4)
- 一種金屬粉,其於銅或銅合金粉之表面形成由Gd、Ho、Lu、Mo、Nb、Os、Re、Ru、Tb、Tc、Th、Tm、U、V、W、Y、Zr、Cr、Rh、Hf、La、Ce、Pr、Nd、Pm、Sm、Ti中之任一種以上所構成之皮膜,且上述皮膜之膜厚為5nm以上且500nm以下,並且銅或銅合金粉之粒徑d50為20μm以上且100μm以下。
- 如請求項1所述之金屬粉,其中,銅或銅合金粉之氧濃度為1000wtppm以下。
- 一種金屬積層造形物,其使用有請求項1或2所述之金屬粉,且導電率為90%IACS以上。
- 如請求項3所述之金屬積層造形物,其相對密度為97%以上。
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US10953464B2 (en) * | 2016-11-22 | 2021-03-23 | The Johns Hopkins University | Empowering additive manufacturing metals and alloys against localized three-dimensional corrosion |
EP3950176A4 (en) * | 2019-06-13 | 2022-07-20 | Fukuda Metal Foil & Powder Co., Ltd. | COPPER POWDER FOR SHAPING LAMINATE, SHAPING LAMINATE BODY, METHOD FOR MAKING SHAPING LAMINATE BODY, AND APPARATUS FOR SHAPING LAMINATE |
JP6857820B1 (ja) * | 2019-12-19 | 2021-04-14 | 株式会社アドマテックス | 粒子材料及びその製造方法、並びにフィラー材料 |
CA3158633C (en) * | 2020-06-26 | 2023-12-19 | Jx Nippon Mining & Metals Corporation | Copper alloy powder having si coating film and method for producing same |
CN113543450B (zh) * | 2021-06-25 | 2022-10-25 | 西安交通大学 | 一种用于超导腔的铜铌复合材料板的制作方法 |
CN113798510B (zh) * | 2021-08-10 | 2023-03-31 | 西安理工大学 | 利用W改性AlSi10Mg回收粉末3D打印的方法 |
CN113695582B (zh) * | 2021-11-01 | 2022-01-18 | 陕西斯瑞新材料股份有限公司 | 一种耐高温高导电CuCrNb系铜合金粉末的制备方法 |
CN114559046B (zh) * | 2022-01-26 | 2023-07-25 | 中北大学 | 一种增材制造用稀土改性17-4ph高强钢粉末的制备方法 |
CN114855130B (zh) * | 2022-04-27 | 2023-11-21 | 鑫合德(清远)智能科技发展有限公司 | 一种低激光反射率铬包铜复合粉体的制备方法及其制备装置 |
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