CN112430092A - 一种钛合金mim制品烧结用氧化钇涂料及其在刚玉-莫来石承烧板上的应用 - Google Patents

一种钛合金mim制品烧结用氧化钇涂料及其在刚玉-莫来石承烧板上的应用 Download PDF

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CN112430092A
CN112430092A CN202011494032.3A CN202011494032A CN112430092A CN 112430092 A CN112430092 A CN 112430092A CN 202011494032 A CN202011494032 A CN 202011494032A CN 112430092 A CN112430092 A CN 112430092A
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yttrium oxide
coating
corundum
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潘建华
潘建中
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Hunan Renhai Materials Science And Technology Development Co ltd
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Abstract

本发明公开了一种钛合金MIM制品烧结用氧化钇涂料，由电熔氧化钇粉末、成膜剂、氧化钇溶胶、分散剂充分混匀消泡制成，所述电熔氧化钇粉末包括如下重量百分比的组分：粒度≤180目的电熔氧化钇40～65%，粒度≤320目的电熔氧化钇20～40%，D90≤10um的氧化钇微粉10～20%。本发明还提供了该氧化钇涂料在刚玉‑莫来石承烧板上的应用，用喷枪将调好的氧化钇涂料均匀涂覆在刚玉‑莫来石承烧板表面；自然干燥后，转入烘箱120℃干燥6～12h，然后在电炉内1500～1650℃，保温3～6小时，自然冷却后得到氧化钇涂层刚玉‑莫来石承烧板。本发明的氧化钇涂层刚玉‑莫来石承烧板生产成本低，膨胀系数小，抗热震性好，满足了需要快速冷却的MIM烧结工艺的需要。

Description

一种钛合金MIM制品烧结用氧化钇涂料及其在刚玉-莫来石承 烧板上的应用
技术领域
本发明涉及钛合金加工生产领域，尤其涉及一种钛合金MIM制品烧结用氧化钇涂料及其在刚玉-莫来石承烧板上的应用。
背景技术
钛及钛合金的比重几乎是铁金属的一半，具有低密度、高强度及令人满意的生物兼容性，在航空、航天、化工、生物医学等领域得到广泛应用。金属粉末注射成形(MIM)是将粉末冶金技术与塑料注射成形技术相结合而形成的一种净成形工艺,具有原料利用率高、组分调整灵活及净成形或近净成形等优点,可以制备出尺寸在100mm以内的高维度、高精度的零部件,因此是一种理想的钛及钛合金制备加工工艺。烧结是MIM工艺中非常重要的工序,对制品的组织、致密性能及化学性质均匀性起着决定性作用。对于不锈钢MIM零件，烧结时经常使用刚玉-莫来石质和99氧化铝质承烧板。但由于钛和钛合金是一种高化学活性金属，氧亲和性高，在高温烧结时易与现有材质的承烧板发生化学反应并生成脆性化合物，从而导致钛合金金属零件力学性能下降。氧化钇坩埚成功应用于钛合金熔融铸造，证明氧化钇对钛合金具有较好的抗润湿和抗侵蚀性能。然而利用纯氧化钇制作承烧板，不但价格昂贵，而且制品膨胀系数大，抗热震性较差。
发明内容
为解决上述现有技术中存在的技术问题，本发明提供一种钛合金MIM制品烧结用氧化钇涂料，并以抗热震性优秀的刚玉-莫来石承烧板为基板，在其表面涂覆抗侵蚀性能突出的氧化钇涂层，用于生产钛合金MIM零件烧结用复合承烧板。
本发明提供的一种钛合金MIM制品烧结用氧化钇涂料，由电熔氧化钇粉末、成膜剂、氧化钇溶胶、分散剂充分混匀消泡制成，所述电熔氧化钇粉末、成膜剂、氧化钇溶胶、分散剂的质量比为1∶（0.3～0.5）∶（0.02～0.05）∶（0.002～0.008），其中，所述电熔氧化钇粉末包括如下重量百分比的组分：180目～0电熔氧化钇40～65%，320目～0电熔氧化钇20～40%，D90≤10um的氧化钇微粉10～20%。
进一步地，所述成膜剂为水溶性树脂、PVA、甲基纤维素中的一种。
进一步地，所述分散剂为聚丙烯酸铵或聚甲基丙烯酸铵。
本发明还提供了上述氧化钇涂料在刚玉-莫来石承烧板上的应用，具体包括如下步骤：
（1）涂料制备：按重量份数分别称取180目～0电熔氧化钇、320目～0电熔氧化钇、D90≤10um的氧化钇微粉以及成膜剂、氧化钇溶胶、分散剂，在高速搅拌机中充分混匀消泡得到氧化钇涂料；
（2）涂料涂覆：用喷枪将调好的氧化钇涂料均匀涂覆在刚玉-莫来石承烧板表面得到湿坯；
（3）干燥与烧结：将湿坯自然干燥6～12小时后，转入烘箱120℃干燥6～12h，使水分充分挥发，然后在电炉内1500～1650℃，保温3～6小时，自然冷却后得到氧化钇涂层刚玉-莫来石承烧板。
本发明提供了一种钛合金MIM制品烧结用氧化钇涂料，并以抗热震性优秀的刚玉-莫来石承烧板为基板，在其表面涂覆该氧化钇涂料涂层，得到了一种用于生产钛合金MIM零件烧结用复合承烧板，其生产成本低，膨胀系数小，抗热震性好，满足了需要快速冷却的MIM烧结工艺的需要。
附图说明
图1是本发明的氧化钇涂层刚玉-莫来石承烧板的低倍显微照片。
图2是本发明的氧化钇涂层刚玉-莫来石承烧板的高倍显微照片。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
实施例1
（1）涂料制备：称取180目电熔氧化钇50%、320目电熔氧化钇40%、D90≤10um的氧化钇微粉10%，外加成膜剂PVA30%、氧化钇溶胶2%、分散剂聚丙烯酸铵0.2%，倒入高速搅拌机中充分混匀消泡得到氧化钇涂料；
（2）涂料涂覆：用喷枪将调好的氧化钇涂料均匀涂覆在刚玉-莫来石承烧板表面得到湿坯；
（3）干燥与烧结：将湿坯自然干燥6小时后，转入烘箱120℃干燥6h，使水分充分挥发，然后在电炉内1500℃，保温6小时，自然冷却后得到氧化钇涂层刚玉-莫来石承烧板。
实施例2
（1）涂料制备：称取180目电熔氧化钇45%、320目电熔氧化钇35%、D90≤10um的氧化钇微粉20%，外加成膜剂PVA30%、氧化钇溶胶2%、分散剂聚丙烯酸铵0.2%，倒入高速搅拌机中充分混匀消泡得到氧化钇涂料；
（2）涂料涂覆：用喷枪将调好的氧化钇涂料均匀涂覆在刚玉-莫来石承烧板表面得到湿坯；
（3）干燥与烧结：将湿坯自然干燥10小时后，转入烘箱120℃干燥8h，使水分充分挥发，然后在电炉内1600℃，保温5小时，自然冷却后得到氧化钇涂层刚玉-莫来石承烧板。
实施例3
（1）涂料制备：称取180目电熔氧化钇65%、320目电熔氧化钇20%、D90≤10um的氧化钇微粉15%，外加甲基纤维素40%、氧化钇溶胶5%、分散剂聚甲基丙烯酸铵0.8%，倒入高速搅拌机中充分混匀消泡得到氧化钇涂料；
（2）涂料涂覆：用喷枪将调好的氧化钇涂料均匀涂覆在刚玉-莫来石承烧板表面得到湿坯；
（3）干燥与烧结：将湿坯自然干燥6小时后，转入烘箱120℃干燥12h，使水分充分挥发，然后在电炉内1650℃，保温3小时，自然冷却后得到氧化钇涂层刚玉-莫来石承烧板。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (5)

1.一种钛合金MIM制品烧结用氧化钇涂料，其特征在于：由电熔氧化钇粉末、成膜剂、氧化钇溶胶、分散剂充分混匀消泡制成，所述电熔氧化钇粉末、成膜剂、氧化钇溶胶、分散剂的质量比为1∶（0.3～0.5）∶（0.02～0.05）∶（0.002～0.008），其中，所述电熔氧化钇粉末包括如下重量百分比的组分：粒度≤180目的电熔氧化钇40～65%，粒度≤320目的电熔氧化钇20～40%，D90≤10um的氧化钇微粉10～20%。
2.如权利要求1所述的一种钛合金MIM制品烧结用氧化钇涂料，其特征在于：所述成膜剂为水溶性树脂、PVA、甲基纤维素中的一种。
3.如权利要求1所述的一种钛合金MIM制品烧结用氧化钇涂料，其特征在于：所述分散剂为聚丙烯酸铵或聚甲基丙烯酸铵。
4.权利要求1-3任意一项所述氧化钇涂料在刚玉-莫来石承烧板上的应用。
5.如权利要求4所述的氧化钇涂料在刚玉-莫来石承烧板上的应用，包括如下步骤：
（1）涂料制备：按重量份数分别称取粒度≤180目的电熔氧化钇、粒度≤320目的电熔氧化钇、D90≤10um的氧化钇微粉以及成膜剂、氧化钇溶胶、分散剂，在高速搅拌机中充分混匀消泡得到氧化钇涂料；
（2）涂料涂覆：用喷枪将调好的氧化钇涂料均匀涂覆在刚玉-莫来石承烧板表面得到湿坯；
（3）干燥与烧结：将湿坯自然干燥6～12小时后，转入烘箱120℃干燥6～12h，使水分充分挥发，然后在电炉内1500～1650℃，保温3～6小时，自然冷却后得到氧化钇涂层刚玉-莫来石承烧板。
CN202011494032.3A 2020-12-16 2020-12-16 一种钛合金mim制品烧结用氧化钇涂料及其在刚玉-莫来石承烧板上的应用 Pending CN112430092A (zh)

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